Montes-Orozco, E., 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)”. International Journal of Combinatorial Optimization Problems and Informatics, vol. 8, no. 1, Jan. 2018, pp. 39-44, https://ijcopi.org/ojs/article/view/6.