Lugo Martinez, W. A., Avila Rios, H. Y., Vanegas Chamorro, M. C., Albis Arrieta, A. and Ardila Barragán, M. A. (2019) “Evaluation of demineralization of semi-anthracites from mines located in Boyacá and Santander (Colombia)”, INGE CUC, 15(2), pp. 48–55. doi: 10.17981/ingecuc.15.2.2019.05.