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2008
Backes M, Hamerlik M, Linari A, Maffei M, Tryfonopoulos C, Weikum G.  2008.  Anonymous and Censorship-resistant Content-sharing in Unstructured Overlays.
Mateevitsi V., Sfakianos M., Lepouras G, Vassilakis C.  2008.  A game-engine based virtual museum authoring and presentation system. Proceedings - 3rd International Conference on Digital Interactive Media in Entertainment and Arts, DIMEA 2008. :451-457.
Vassilakis C, Katifori A, Daradimos I., Lepouras G.  2008.  An Integrated Environment for Cataloguing and Online Presentation of Museum Exhibits. DESIDOC Journal of Library and Information Technology. 28(4):72-78.
Golemati M., Vassilakis C, Katifori A, Lepouras G, Halatsis C..  2008.  Intelligent User Interfaces: Adaptation and Personalization Systems and Technologies. :188–204.
Golemati M., Katifori A, Giannopoulou E.G., Daradimos I., Vassilakis C, Lepouras G, Halatsis C..  2008.  An interview-based user study on the use of visualizations for folder browsing. Proceedings of the International Conference on Information Visualisation. :106-112.
Vassilakis C, Lepouras G, Skiadopoulos S.  2008.  Mobile and context-aware e-commerce: Issues, challenges and research directions. Journal of Electronic Commerce in Organizations. 6:i-iv.
Katifori A, Vassilakis C, Daradimos I., Lepouras G, Ioannidis Y, Dix A, Poggi A, Catarci T.  2008.  Personal Ontology Creation and Visualization for a Personal Interaction Management System. Proceedings of PIM, CHI 2008.
Katifori A, Torou E, Vassilakis C, Lepouras G, Halatsis C..  2008.  Selected results of a comparative study of four ontology visualization methods for information retrieval tasks. Proceedings of the 2nd International Conference on Research Challenges in Information Science, RCIS 2008. :133-140.
2007
Katifori A, Golemati M., Vassilakis C, Lepouras G, Halatsis C..  2007.  Creating an Ontology for the User Profile: Method and Applications. RCIS. :407–412.
Lepouras G, Vassilakis C, Halatsis C., Georgiadis P..  2007.  Domain expert user development: The smartgov approach. Communications of the ACM. 50:79-83.
Vassilakis C, Lepouras G.  2007.  Encyclopedia of Digital Government. :1174–1179.
Lepouras G, Vassilakis C.  2007.  Encyclopedia of Digital Government. :1413–1417.
Katifori A, Vassilakis C, Torou E, Lepouras G, Halatsis C., Daradimos I..  2007.  Historical Archive Ontologies Requirements, Modeling and Visualization. RCIS. :401-406.
Vassilakis C, Lepouras G, Halatsis C..  2007.  A knowledge-based approach for developing multi-channel e-government services. Electronic Commerce Research and Applications. 6:113-124.
Katifori A, Halatsis C., Lepouras G, Vassilakis C, Giannopoulou E.G..  2007.  Ontology visualization methods - A survey. ACM Computing Surveys. 39:10:1-10:43.
Vassilakis C, Lepouras G, Katifori A.  2007.  Web service execution streamlining. Proceedings - ICSSSM'06: 2006 International Conference on Service Systems and Service Management. 2:1564-1569.
2006
Katifori A, Torou E, Halatsis C., Lepouras G, Vassilakis C.  2006.  A Comparative Study of Four Ontology Visualization Techniques in Protege: Experiment Setup and Preliminary Results. IV '06: Proceedings of the conference on Information Visualization. :417–423.
Vassilakis C, Lepouras G.  2006.  Component reuse in electronic services development. J. Comp. Methods in Sci. and Eng.. 6:229–241.
Golemati M., Halatsis C., Vassilakis C, Katifori A, Lepouras G.  2006.  A context-based adaptive visualization environment. Proceedings of the International Conference on Information Visualisation. :62-67.
Torou E, Katifori A, Vassilakis C, Lepouras G, Halatsis C..  2006.  Creating an Historical Archive Ontology: Guidelines and Evaluation. ICDIM. :102-109.
Vassilakis C, Lepouras G.  2006.  Encyclopedia of E-Commerce, E-Government and Mobile Commerce. :865–870.
Lepouras G, Sotiropoulou A, Theotokis D, Vassilakis C.  2006.  Encyclopedia of E-Commerce, E-Government and Mobile Commerce. :1064–1069.
Lepouras G, Vassilakis C.  2006.  Encyclopedia of E-Commerce, E-Government and Mobile Commerce. :1–6.
Vassilakis C, Lepouras G, Katifori A.  2006.  Reverse engineering electronic services: from e-forms to knowledge. ICSOFT (1). :273-278.
Magoulas G.D, Lepouras G, Vassilakis C.  2006.  Virtual reality in the e-Society. Virtual Reality. 11:71-73.