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C. Rold and T. Berg, Sourcing Strategies: Relationship Models and Case Studies, Note Number: R-18-9925, 2003.

B. Vassiliadis, V. Fotopoulos, M. Xenos, and A. Skodras, Could Grid Facilitate Demanding Media Watermarking Applications?, Proceedings of the 4th International LeGE-WG Workshop, 2004.
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M. Xenos, C. Pierrakeas, and P. Pintelas, A survey on student dropout rates and dropout causes concerning the students in the Course of Informatics of the Hellenic Open University, Computers & Education, vol.39, issue.4, pp.361-377, 2002.
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M. Xenos and A. Skodras, Evolving from a Traditional Distance Learning Model to e-Learning, Proceedings of the 1st International LeGE-WG Workshop, 2003.
URL : https://hal.archives-ouvertes.fr/hal-00190456

M. Xenos, N. Avouris, V. Komis, D. Stavrinoudis, and M. Margaritis, Synchronous collaboration in distance education: a case study in a Computer Science Course, Proceedings of the 4th IEEE International Conference on Advance Learning Technologies, pp.500-504, 2004.

C. Foster, J. Kesselman, S. Nick, and . Tuecke, The Physiology of the Grid, 2002.
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G. Allen, T. Dramlitsch, I. Foster, N. Karonis, M. Ripeanu et al., Supporting Efficient Execution in Heterogeneous Distributed Computing Evironments with Cactus and Globus, Proceedings of Supercomputing, 2001.