Erika Ruíz and  Luis Amaya and  Diego Carreño,  A Location Routing Model for the Logistic System in the Mining Collection Centers of the Northern Region of Boyacá-Colombia.   journal   = {International Journal of Industrial and Manufacturing Engineering}, [online]. World Academy of Science, Engineering and Technology.
    January 2017, vol. 132(12). 1920 - 1924
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/10008586.