Multiple Approaches to Intelligent Systems 12th International Conference on Industrial and Engineering Applications of Artificial Intelligence and Expert Systems IEA/AIE-99, Cairo, Egypt, May 31 - June 3, 1999, Proceedings - Imam, Ibrahim F.; Imam, Ibrahim F.; Kodratoff, Yves; Kodratoff, Yves; El-Dessouki, Ayman; El-Dessouki, Ayman; Ali, Moonis; Ali, Moonis (Springer Berlin Heidelberg : Imprint: Springer, 1999)