Reactive tabu adaptive memory programming search for the vehicle routing problem with backhauls. - Naveed Wassan (J. Oper. Res. Soc., 2007)

Solving the Mixed Backhauling Vehicle Routing: Problem with Ants. - Niaz A. Wassan; Saïd Salhi; Gábor Nagy 001; Naveed Wassan; Anne C. Wade (Int. J. Energy Optim. Eng., 2013)

The Multiple Trip Vehicle Routing Problem with Backhauls: Formulation and a Two-Level Variable Neighbourhood Search. - Naveed Wassan; Niaz A. Wassan; Gábor Nagy 001; Saïd Salhi (Comput. Oper. Res., 2017)