@book {188, title = {Artificial Intelligence: Theories, Models and Applications 5th Hellenic Conference on AI}, series = {Lecture Notes in Computer Science}, volume = {5138}, year = {2008}, isbn = {978-3-540-87880-3}, url = {http://www.springer.com/computer/artificial/book/978-3-540-87880-3}, author = {J. Darzentas and G. Vouros and Arnellos, A and Vosinakis, S.} }