Puenayán, D.E., Londoño, J.C., Escobar, J.W. and Linfati, R. 1. An algorithm based on a granular tabu search for the solution of a vehicle routing problem by considering heterogeneous fleet. Revista Ingenierías Universidad de Medellín. 13, 25 (1), 81-98. DOI:https://doi.org/10.22395/rium.v13n25a6.