An Experimental Study of a Simple Ant Colony System for the Vehicle Routing Problem with Time Windows. - Ismail Ellabib; Otman A. Basir; Paul H. Calamai (Ant Algorithms, 2002)

Exchange strategies for multiple Ant Colony System. - Ismail Ellabib; Paul H. Calamai; Otman A. Basir (Inf. Sci., 2007)