Alexakos, C. , Giotopoulos, K. , Thermogianni, E. , Beligiannis, G. , Likothanassis, S.. "Integrating E-learning Environments with Computational Intelligence Assessment Agents". World Academy of Science, Engineering and Technology, Open Science Index 19, International Journal of Educational and Pedagogical Sciences (2008), 2(7), 791 - 796.