E. Montes-Orozco, R. A. Mora-Gutiérrez, and J. Ramírez-Rodríguez, “A hybrid algorithm between the ant system and the harmonic search for solving the vehicle routing problem with time windows (VRP-TW)”, Int. Journal of COP and Infor., vol. 8, no. 1, pp. 39–44, Jan. 2018.