A. J. Aparicio Ortubé and L. O. Suárez Burgoa, “Assesment of the Mechanical Variability of Rock Slabs by Means of Non-Destructive Tests: Analysis Methods”, ing.cienc., vol. 14, no. 27, pp. 101–116, June 2018, doi: 10.17230/ingciencia.14.27.5.