Methods and Applications of Artificial Intelligence Second Hellenic Conference on AI, SETN 2002 Thessaloniki, Greece, April 11-12, 2002 Proceedings - Vlahavas, Ioannis P.; Vlahavas, Ioannis P.; Spyropoulos, Constantine D.; Spyropoulos, Constantine D. (Springer Berlin Heidelberg : Imprint: Springer, 2002)