Parallel Ant System for the Set Covering Problem. - Malek Rahoual; Riad Hadji; Vincent Bachelet (Ant Algorithms, 2002)

Parallel artificial immune system for the constrained graph list multicolouring problem. - Riad Hadji; Nabil Menni; Ahmed Meraga; Malika Bessedik (Int. J. Metaheuristics, 2014)