Montero-Gainza, T., J. A. Alayo-Llorén, C. L. Reynaldo-Argüelles, and M. I. García-de la Cruz. “Valuation of Maintenance Management in Excavation Equipment of the Basic Mining Unit”. Science & Future, vol. 11, no. 2, July 2021, pp. 69-86, https://revista.ismm.edu.cu/index.php/revistacyf/article/view/2081.