Christos Bouras, Panagiotis Destounis, John D. Garofalakis, Apostolos Gkamas, G. Sakalis, Evangelos Sakkopoulos, John Tsaknakis, Thrasyvoulos Tsiatsos. Efficient web-based open and distance learning services. Telematics and Informatics, 17(2):213-237, 2000. [doi]
Abstract is missing.