P.B. Sloep, A.J. Berlanga, W. Greller, S. Stoyanov, M. van der Klink, S. Retalis, J. Hensgens: Educational Innovation with Learning Networks: Tools and Developments /jucs_18_1/educational_innovation_with_learning
V. Makrakis, S. Retalis, A. Koutoumanos, N. Papaspyrou, M. Skordalakis: Evaluating the Effectiveness of an ODL Hypermedia System and Courseware at the National Technical University of Athens: A Case Study /jucs_4_3/evaluating_the_effectiveness_of