CitNetExplorer: A new software tool for analyzing and visualizing citation networks

Citations

Cited by:

1. Nadine Desrochers & Adèle Paul‐Hus & Jen Pecoskie, 2017. "Five decades of gratitude: A meta‐synthesis of acknowledgments research," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 68(12), pages 2821-2833, December.
2. Xu, Xiaoyan & Chung, Sai-Ho & Lo, Chris K.Y. & Yeung, Andy C.L., 2022. "Sustainable supply chain management with NGOs, NPOs, and charity organizations: A systematic review and research agenda," Transportation Research Part E: Logistics and Transportation Review, Elsevier, vol. 164(C).
3. Lingye Tan & Tiong Lee Kong & Ziyang Zhang & Ahmed Sayed M. Metwally & Shubham Sharma & Kanta Prasad Sharma & Sayed M. Eldin & Dominik Zimon, 2023. "Scheduling and Controlling Production in an Internet of Things Environment for Industry 4.0: An Analysis and Systematic Review of Scientific Metrological Data," Sustainability, MDPI, vol. 15(9), pages 1-37, May.
4. Fargher, Neil & Wee, Marvin, 2019. "The impact of Ball and Brown (1968) on generations of research," Pacific-Basin Finance Journal, Elsevier, vol. 54(C), pages 55-72.
5. Oda, Hiromu & Noguchi, Hiroki & Fuse, Masaaki, 2022. "Review of life cycle assessment for automobiles: A meta-analysis-based approach," Renewable and Sustainable Energy Reviews, Elsevier, vol. 159(C).
6. Jose Torres-Pruñonosa & Miquel Angel Plaza-Navas & Francisco Díez-Martín & Albert Beltran-Cangrós, 2021. "The Intellectual Structure of Social and Sustainable Public Procurement Research: A Co-Citation Analysis," Sustainability, MDPI, vol. 13(2), pages 1-33, January.
7. Mehmet Karakus & Muhammet Usak & Alpay Ersozlu, 2021. "Emotions in Learning, Teaching, and Leadership: A Bibliometric Review of Asian Literature (1990–2018)," SAGE Open, , vol. 11(1), pages 21582440209, January.
8. Iuliia Trabskaia & Aleksei Gorgadze & Mervi Raudsaar & Heidi Myyryläinen, 2023. "A Bibliometric Analysis of Social Entrepreneurship and Entrepreneurial Ecosystems," Administrative Sciences, MDPI, vol. 13(3), pages 1-17, March.
9. Jensen, Scott & Liu, Xiaozhong & Yu, Yingying & Milojevic, Staša, 2016. "Generation of topic evolution trees from heterogeneous bibliographic networks," Journal of Informetrics, Elsevier, vol. 10(2), pages 606-621.
10. Fan Zeng & Stacy Hyun Nam Lee & Chris Kwan Yu Lo, 2020. "The Role of Information Systems in the Sustainable Development of Enterprises: A Systematic Literature Network Analysis," Sustainability, MDPI, vol. 12(8), pages 1-29, April.
11. Gao, Qiang & Liang, Zhentao & Wang, Ping & Hou, Jingrui & Chen, Xiuxiu & Liu, Manman, 2021. "Potential index: Revealing the future impact of research topics based on current knowledge networks," Journal of Informetrics, Elsevier, vol. 15(3).
12. Cailin Wang & Jidong Wu & Xin He & Mengqi Ye & Wenhui Liu & Rumei Tang, 2018. "Emerging Trends and New Developments in Disaster Research after the 2008 Wenchuan Earthquake," IJERPH, MDPI, vol. 16(1), pages 1-19, December.
13. Tamás Stadler & Ágoston Temesi & Zoltán Lakner, 2022. "Soil Chemical Pollution and Military Actions: A Bibliometric Analysis," Sustainability, MDPI, vol. 14(12), pages 1-17, June.
14. Zoltán Lakner & Brigitta Plasek & Anna Kiss & Sándor Soós & Ágoston Temesi, 2021. "Derailment or Turning Point? The Effect of the COVID-19 Pandemic on Sustainability-Related Thinking," Sustainability, MDPI, vol. 13(10), pages 1-13, May.
15. Henrique Nascimento & Clara Martinez-Perez & Cristina Alvarez-Peregrina & Miguel Ángel Sánchez-Tena, 2020. "Citations Network Analysis of Vision and Sport," IJERPH, MDPI, vol. 17(20), pages 1-22, October.
16. Cai, Ya-Jun & Lo, Chris K.Y., 2020. "Omni-channel management in the new retailing era: A systematic review and future research agenda," International Journal of Production Economics, Elsevier, vol. 229(C).
17. Vladimir Batagelj & Anuška Ferligoj & Flaminio Squazzoni, 2017. "The emergence of a field: a network analysis of research on peer review," Scientometrics, Springer;Akadémiai Kiadó, vol. 113(1), pages 503-532, October.
18. Xinxin Wang & Zeshui Xu & Yong Qin, 2022. "Structure, trend and prospect of operational research: a scientific analysis for publications from 1952 to 2020 included in Web of Science database," Fuzzy Optimization and Decision Making, Springer, vol. 21(4), pages 649-672, December.
19. Jie Li & Floris Goerlandt & Karolien van Nunen & Koen Ponnet & Genserik Reniers, 2022. "Conceptualizing the Contextual Dynamics of Safety Climate and Safety Culture Research: A Comparative Scientometric Analysis," IJERPH, MDPI, vol. 19(2), pages 1-22, January.
20. Zoltán Lakner & Brigitta Plasek & Gyula Kasza & Anna Kiss & Sándor Soós & Ágoston Temesi, 2021. "Towards Understanding the Food Consumer Behavior–Food Safety–Sustainability Triangle: A Bibliometric Approach," Sustainability, MDPI, vol. 13(21), pages 1-23, November.
21. Massimo Franceschet & Giovanni Colavizza, 2020. "Quantifying the higher-order influence of scientific publications," Scientometrics, Springer;Akadémiai Kiadó, vol. 125(2), pages 951-963, November.
22. Drago, Carlo & Errichiello, Luisa, 2024. "Remote Work admist the Covid-19 outbreak: Insights from an Ensemble Community-Based Keyword Network Analysis," FEEM Working Papers 341640, Fondazione Eni Enrico Mattei (FEEM).
23. Jasmina Berbegal-Mirabent, 2021. "What Do We Know about Co-Working Spaces? Trends and Challenges Ahead," Sustainability, MDPI, vol. 13(3), pages 1-30, January.
24. Clara Martinez-Perez & Cristina Alvarez-Peregrina & Cesar Villa-Collar & Miguel Ángel Sánchez-Tena, 2020. "Citation Network Analysis of the Novel Coronavirus Disease 2019 (COVID-19)," IJERPH, MDPI, vol. 17(20), pages 1-27, October.
25. Philippe Gorry & Pascal Ragouet, 2016. "“Sleeping beauty” and her restless sleep: Charles Dotter and the birth of interventional radiology," Scientometrics, Springer;Akadémiai Kiadó, vol. 107(2), pages 773-784, May.
26. Andy Wai Kan Yeung & Ioana Mozos, 2020. "The Innovative and Sustainable Use of Dental Panoramic Radiographs for the Detection of Osteoporosis," IJERPH, MDPI, vol. 17(7), pages 1-11, April.
27. Kun Shi & Yi Zhou & Zhen Zhang, 2021. "Mapping the Research Trends of Household Waste Recycling: A Bibliometric Analysis," Sustainability, MDPI, vol. 13(11), pages 1-23, May.
28. Morteza Akbari & Hamid Padash & Zahra Shahabaldini Parizi & Haniye Rezaei & Elmira Shahriari & Ala Khosravani, 2022. "A bibliometric review of green innovation research: identifying knowledge domain and network," Quality & Quantity: International Journal of Methodology, Springer, vol. 56(6), pages 3993-4023, December.
29. Klaus Kammerer & Manuel Göster & Manfred Reichert & Rüdiger Pryss, 2021. "Ambalytics: A Scalable and Distributed System Architecture Concept for Bibliometric Network Analyses," Future Internet, MDPI, vol. 13(8), pages 1-29, August.
30. Dias, Rubens Alves & Rios de Paula, Marília & Silva Rocha Rizol, Paloma Maria & Matelli, José Alexandre & Rodrigues de Mattos, Cristiano & Perrella Balestieri, José Antonio, 2021. "Energy education: Reflections over the last fifteen years," Renewable and Sustainable Energy Reviews, Elsevier, vol. 141(C).
31. Thor, Andreas & Marx, Werner & Leydesdorff, Loet & Bornmann, Lutz, 2016. "Introducing CitedReferencesExplorer (CRExplorer): A program for reference publication year spectroscopy with cited references standardization," Journal of Informetrics, Elsevier, vol. 10(2), pages 503-515.
32. Chankook Park & Minkyu Kim, 2021. "A Study on the Characteristics of Academic Topics Related to Renewable Energy Using the Structural Topic Modeling and the Weak Signal Concept," Energies, MDPI, vol. 14(5), pages 1-24, March.
33. Waltman, Ludo, 2016. "A review of the literature on citation impact indicators," Journal of Informetrics, Elsevier, vol. 10(2), pages 365-391.
34. Angela Chantre-Astaiza & Laura Fuentes-Moraleda & Ana Muñoz-Mazón & Gustavo Ramirez-Gonzalez, 2019. "Science Mapping of Tourist Mobility 1980–2019. Technological Advancements in the Collection of the Data for Tourist Traceability," Sustainability, MDPI, vol. 11(17), pages 1-32, August.
35. Dahesh, Mehran Badin & Tabarsa, Gholamali & Zandieh, Mostafa & Hamidizadeh, Mohammadreza, 2020. "Reviewing the intellectual structure and evolution of the innovation systems approach: A social network analysis," Technology in Society, Elsevier, vol. 63(C).
36. Gutiérrez-Nieto, Begoña & Serrano-Cinca, Carlos, 2019. "20 years of research in microfinance: An information management approach," International Journal of Information Management, Elsevier, vol. 47(C), pages 183-197.
    • Begoña Gutiérrez Nieto & Carlos Serrano-Cinca, 2019. "20 Years of Research in Microfinance: An Information Management Approach," Working Papers CEB 19-005, ULB -- Universite Libre de Bruxelles.
37. Miguel R. Guevara & Marcelo Mendoza, 2016. "Publishing Patterns in BRIC Countries: A Network Analysis," Publications, MDPI, vol. 4(3), pages 1-14, July.
38. Kashin Sugishita & Yasuo Asakura, 2021. "Vulnerability studies in the fields of transportation and complex networks: a citation network analysis," Public Transport, Springer, vol. 13(1), pages 1-34, March.
39. Jianbo Han & Edwin H. W. Chan & Esther H. K. Yung & Queena K. Qian & Patrick T. I. Lam, 2022. "A Policy Framework for Producing Age-Friendly Communities from the Perspective of Production of Space," IJERPH, MDPI, vol. 19(4), pages 1-23, February.
40. Mehdi Toloo & Rouhollah Khodabandelou & Amar Oukil, 2022. "A Comprehensive Bibliometric Analysis of Fractional Programming (1965–2020)," Mathematics, MDPI, vol. 10(11), pages 1-21, May.
41. Matthew J. Jacobson, 2022. "Archaeological Evidence for Community Resilience and Sustainability: A Bibliometric and Quantitative Review," Sustainability, MDPI, vol. 14(24), pages 1-24, December.
42. Alfredo Alcayde & Francisco G. Montoya & Raul Baños & Alberto-Jesús Perea-Moreno & Francisco Manzano-Agugliaro, 2018. "Analysis of Research Topics and Scientific Collaborations in Renewable Energy Using Community Detection," Sustainability, MDPI, vol. 10(12), pages 1-17, November.
43. Fang Han & Christopher L. Magee, 2018. "Testing the science/technology relationship by analysis of patent citations of scientific papers after decomposition of both science and technology," Scientometrics, Springer;Akadémiai Kiadó, vol. 116(2), pages 767-796, August.
44. Clemente-Gallardo, J. & Ferrer, A. & Íñiguez, D. & Rivero, A. & Ruiz, G. & Tarancón, A., 2019. "Do researchers collaborate in a similar way to publish and to develop projects?," Journal of Informetrics, Elsevier, vol. 13(1), pages 64-77.
45. Miha Dominko & Kaja Primc & Renata Slabe-Erker & Barbara Kalar, 2023. "A bibliometric analysis of circular economy in the fields of business and economics: towards more action-oriented research," Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, Springer, vol. 25(7), pages 5797-5830, July.
46. Lutz Bornmann & Robin Haunschild & Loet Leydesdorff, 2018. "Reference publication year spectroscopy (RPYS) of Eugene Garfield’s publications," Scientometrics, Springer;Akadémiai Kiadó, vol. 114(2), pages 439-448, February.
47. Celeste Vong & Paulo Rita & Nuno António, 2021. "Health-Related Crises in Tourism Destination Management: A Systematic Review," Sustainability, MDPI, vol. 13(24), pages 1-28, December.
48. Antonina Dattolo & Marco Corbatto, 2022. "Assisting researchers in bibliographic tasks: A new usable, real‐time tool for analyzing bibliographies," Journal of the Association for Information Science & Technology, Association for Information Science & Technology, vol. 73(6), pages 757-776, June.
49. Nees Jan Eck & Ludo Waltman, 2017. "Citation-based clustering of publications using CitNetExplorer and VOSviewer," Scientometrics, Springer;Akadémiai Kiadó, vol. 111(2), pages 1053-1070, May.
50. Varvara Nikulina & David Simon & Henrik Ny & Henrikke Baumann, 2019. "Context-Adapted Urban Planning for Rapid Transitioning of Personal Mobility towards Sustainability: A Systematic Literature Review," Sustainability, MDPI, vol. 11(4), pages 1-37, February.
51. Lovro Šubelj & Nees Jan van Eck & Ludo Waltman, 2016. "Clustering Scientific Publications Based on Citation Relations: A Systematic Comparison of Different Methods," PLOS ONE, Public Library of Science, vol. 11(4), pages 1-23, April.
52. Anthony F. J. Raan, 2021. "Laudation on the occasion of the presentation of the Derek de Solla Price Award 2021 to Prof. Ludo Waltman at the ISSI conference, Leuven, 2021," Scientometrics, Springer;Akadémiai Kiadó, vol. 126(10), pages 8235-8238, October.
53. Silva, Filipi N. & Amancio, Diego R. & Bardosova, Maria & Costa, Luciano da F. & Oliveira, Osvaldo N., 2016. "Using network science and text analytics to produce surveys in a scientific topic," Journal of Informetrics, Elsevier, vol. 10(2), pages 487-502.
54. Рубинштейн Александр Яковлевич, "undated". "Ранжирование Российских Экономических Журналов: Научный Метод Или «Игра В Цыфирь»? [Ran Ranking of Russian Economic Journals: The Scientific Method or “Numbers Game”?]," Working papers a:pru175:ye:2016:1, Institute of Economics.
55. Singh, Anjali & Lim, Weng Marc & Jha, Sumi & Kumar, Satish & Ciasullo, Maria Vincenza, 2023. "The state of the art of strategic leadership," Journal of Business Research, Elsevier, vol. 158(C).
56. Zang, Yuzhu & Yang, Yuanyuan & Liu, Yansui, 2021. "Toward serving land consolidation on the table of sustainability: An overview of the research landscape and future directions," Land Use Policy, Elsevier, vol. 109(C).
57. Andreas Thor & Lutz Bornmann & Werner Marx & Rüdiger Mutz, 2018. "Identifying single influential publications in a research field: new analysis opportunities of the CRExplorer," Scientometrics, Springer;Akadémiai Kiadó, vol. 116(1), pages 591-608, July.
58. Romero-Silva, Rodrigo & de Leeuw, Sander, 2021. "Learning from the past to shape the future: A comprehensive text mining analysis of OR/MS reviews," Omega, Elsevier, vol. 100(C).
59. Tamara Poje & Maja Zaman Groff, 2022. "Mapping Ethics Education in Accounting Research: A Bibliometric Analysis," Journal of Business Ethics, Springer, vol. 179(2), pages 451-472, August.
60. Clara Martinez-Perez & Cristina Alvarez-Peregrina & Cesar Villa-Collar & Miguel Ángel Sánchez-Tena, 2020. "Current State and Future Trends: A Citation Network Analysis of the Academic Performance Field," IJERPH, MDPI, vol. 17(15), pages 1-24, July.
61. Xiangcheng Meng & Alan H. S. Chan, 2021. "Current States and Future Trends in Safety Research of Construction Personnel: A Quantitative Analysis Based on Social Network Approach," IJERPH, MDPI, vol. 18(3), pages 1-17, January.
62. Faisal Bin Sulaiman, 2023. "Compact City: What Is the Extent of Our Exploration for Its Meanings? A Systematic Review," Sustainability, MDPI, vol. 15(13), pages 1-22, June.
63. Ratri Parida & Manoj Kumar Dash & Anil Kumar & Edmundas Kazimieras Zavadskas & Sunil Luthra & Eyob Mulat‐weldemeskel, 2022. "Evolution of supply chain finance: A comprehensive review and proposed research directions with network clustering analysis," Sustainable Development, John Wiley & Sons, Ltd., vol. 30(5), pages 1343-1369, October.
64. Yue Guiling & Siti Aisyah Panatik & Mohammad Saipol Mohd Sukor & Noraini Rusbadrol & Li Cunlin, 2022. "Bibliometric Analysis of Global Research on Organizational Citizenship Behavior From 2000 to 2019," SAGE Open, , vol. 12(1), pages 21582440221, February.
65. Qin, Yong & Xu, Zeshui & Wang, Xinxin & Škare, Marinko, 2022. "Green energy adoption and its determinants: A bibliometric analysis," Renewable and Sustainable Energy Reviews, Elsevier, vol. 153(C).
66. Tosi, Mauro Dalle Lucca & dos Reis, Julio Cesar, 2021. "SciKGraph: A knowledge graph approach to structure a scientific field," Journal of Informetrics, Elsevier, vol. 15(1).
67. Jordan, Brett, 2018. "Economics literature on joint production of minerals: A survey," Resources Policy, Elsevier, vol. 55(C), pages 20-28.
68. Feifei Wu & Ruiyu Li & Lucheng Huang & Hong Miao & Xin Li, 2017. "Theme evolution analysis of electrochemical energy storage research based on CitNetExplorer," Scientometrics, Springer;Akadémiai Kiadó, vol. 110(1), pages 113-139, January.
69. Tat Dat Bui & Mohd Helmi Ali & Feng Ming Tsai & Mohammad Iranmanesh & Ming-Lang Tseng & Ming K Lim, 2020. "Challenges and Trends in Sustainable Corporate Finance: A Bibliometric Systematic Review," JRFM, MDPI, vol. 13(11), pages 1-26, October.
70. Ben Zhang & Chenxu Ming, 2023. "Digital Transformation and Open Innovation Planning of Response to COVID-19 Outbreak: A Systematic Literature Review and Future Research Agenda," IJERPH, MDPI, vol. 20(3), pages 1-26, February.
71. Alexandre de A. Gomes Júnior & Vanessa B. Schramm, 2022. "Problem Structuring Methods: A Review of Advances Over the Last Decade," Systemic Practice and Action Research, Springer, vol. 35(1), pages 55-88, February.
72. Bortoletto, Wagner Wilson & Pacagnella Junior, Antonio Carlos & Cabello, Otavio Gomes, 2023. "Exploring the scientific literature on clean development mechanisms: A bibliometric analysis," Energy Policy, Elsevier, vol. 183(C).
73. Pech, Gerson & Delgado, Catarina, 2021. "Screening the most highly cited papers in longitudinal bibliometric studies and systematic literature reviews of a research field or journal: Widespread used metrics vs a percentile citation-based app," Journal of Informetrics, Elsevier, vol. 15(3).
74. Vanesa Abuín-Porras & Clara Martinez-Perez & Carlos Romero-Morales & Roberto Cano-de-la-Cuerda & Patricia Martín-Casas & Patricia Palomo-López & Miguel Ángel Sánchez-Tena, 2021. "Citation Network Study on the Use of New Technologies in Neurorehabilitation," IJERPH, MDPI, vol. 19(1), pages 1-18, December.
75. Sascha Kraus & Matthias Breier & Weng Marc Lim & Marina Dabić & Satish Kumar & Dominik Kanbach & Debmalya Mukherjee & Vincenzo Corvello & Juan Piñeiro-Chousa & Eric Liguori & Daniel Palacios-Marqués &, 2022. "Literature reviews as independent studies: guidelines for academic practice," Review of Managerial Science, Springer, vol. 16(8), pages 2577-2595, November.
76. Matilde Lafuente-Lechuga & Javier Cifuentes-Faura & Ursula Faura-Martínez, 2021. "Sustainability, Big Data and Mathematical Techniques: A Bibliometric Review," Mathematics, MDPI, vol. 9(20), pages 1-21, October.
77. Carlo Drago & Luisa Errichiello, 2024. "Remote Work admist the Covid-19 outbreak: Insights from an Ensemble Community-Based Keyword Network Analysis," Working Papers 2024.05, Fondazione Eni Enrico Mattei.
78. Leydesdorff, Loet & Bornmann, Lutz, 2021. "Disruption indices and their calculation using web-of-science data: Indicators of historical developments or evolutionary dynamics?," Journal of Informetrics, Elsevier, vol. 15(4).
79. Carlos de las Heras-Pedrosa & Carmen Jambrino-Maldonado & Dolores Rando-Cueto & Patricia P. Iglesias-Sánchez, 2022. "COVID-19 Study on Scientific Articles in Health Communication: A Science Mapping Analysis in Web of Science," IJERPH, MDPI, vol. 19(3), pages 1-29, February.
80. Pahrudin Pahrudin & Li-Wei Liu & Shao-Yu Li, 2022. "What Is the Role of Tourism Management and Marketing toward Sustainable Tourism? A Bibliometric Analysis Approach," Sustainability, MDPI, vol. 14(7), pages 1-18, April.
81. Juan Pablo Bascur & Suzan Verberne & Nees Jan Eck & Ludo Waltman, 2023. "Academic information retrieval using citation clusters: in-depth evaluation based on systematic reviews," Scientometrics, Springer;Akadémiai Kiadó, vol. 128(5), pages 2895-2921, May.
82. Wenhe Min & Zhonggen Yu, 2023. "A Bibliometric Analysis of Augmented Reality in Language Learning," Sustainability, MDPI, vol. 15(9), pages 1-15, April.
83. Moaaz Kabil & Mohamed Abouelseoud & Faisal Alsubaie & Heba Mostafa Hassan & Imre Varga & Katalin Csobán & Lóránt Dénes Dávid, 2022. "Evolutionary Relationship between Tourism and Real Estate: Evidence and Research Trends," Sustainability, MDPI, vol. 14(16), pages 1-19, August.
84. Bilal Manzoor & Idris Othman & Juan Carlos Pomares, 2021. "Digital Technologies in the Architecture, Engineering and Construction (AEC) Industry—A Bibliometric—Qualitative Literature Review of Research Activities," IJERPH, MDPI, vol. 18(11), pages 1-26, June.
85. Moaaz Kabil & Setiawan Priatmoko & Róbert Magda & Lóránt Dénes Dávid, 2021. "Blue Economy and Coastal Tourism: A Comprehensive Visualization Bibliometric Analysis," Sustainability, MDPI, vol. 13(7), pages 1-25, March.
86. Mostafa, Mohamed M., 2022. "Five decades of catastrophe theory research: Geographical atlas, knowledge structure and historical roots," Chaos, Solitons & Fractals, Elsevier, vol. 159(C).
87. Anthony F. J. Raan, 2017. "Sleeping beauties cited in patents: Is there also a dormitory of inventions?," Scientometrics, Springer;Akadémiai Kiadó, vol. 110(3), pages 1123-1156, March.
88. McLevey, John & McIlroy-Young, Reid, 2017. "Introducing metaknowledge: Software for computational research in information science, network analysis, and science of science," Journal of Informetrics, Elsevier, vol. 11(1), pages 176-197.
89. Budler, Marko & Župič, Ivan & Trkman, Peter, 2021. "The development of business model research: A bibliometric review," Journal of Business Research, Elsevier, vol. 135(C), pages 480-495.
90. Robin Haunschild & Werner Marx, 2020. "Discovering seminal works with marker papers," Scientometrics, Springer;Akadémiai Kiadó, vol. 125(3), pages 2955-2969, December.
91. Pablo Sánchez-Núñez & Carlos de las Heras-Pedrosa & José Ignacio Peláez, 2020. "Opinion Mining and Sentiment Analysis in Marketing Communications: A Science Mapping Analysis in Web of Science (1998–2018)," Social Sciences, MDPI, vol. 9(3), pages 1-20, February.