1. Ai T. J., Kachitvichyanukul V. (2007) A particle swarm optimization for the capacitated vehicle routing problem. Logistics and Supply Chain Management Systems, 2(1): 50–55
2. Ai T. J., Kachitvichyanukul V. (2009a) Particle swarm optimization and two solution representations for solving the capacitated vehicle routing problem. Computers and Industrial Engineering 56(1): 380–387
3. Ai T. J., Kachitvichyanukul V. (2009b) A particle swarm optimization for the vehicle routing problem with simultaneous pickup and delivery. Computers and Operations Research 5(4): 1693–1702
4. Belmecheri, F., Prins, C., Yalaoui, F., & Amodeo, L. (2009a). An ant colony optimization algorithm for a vehicle routing problem with heterogeneous fleet, mixed backhauls, and time windows. In 13th IFAC Symposium on INformation COntrol problems in Manufacturing (Vol. 13, pp. 1533–1538), Moscow, Russia.
5. Belmecheri, F., Prins, C., Yalaoui, F., & Amodeo, L. (2010a). A new particle swarm optimization on vehicle routing problem with heterogeneous fleet, mixed backhauls, and time windows. In 5th International Symposium on Hydrocarbons and Chemistry-Session: Optimizations and Logistics (Layout, Transportation, Scheduling), Algiers, Algeria.