Ortega-Ramos, C.A., Franco-Bonfante, T.M., Blandón-Montes, A. and Molina-Escobar, J.M. 2018. Explosibility risk evaluation of the methane gas in coal underground mining, case Sinifaná basin, Colombia. Boletín de Geología. 40, 1 (Feb. 2018), 83–91. DOI:https://doi.org/10.18273/revbol.v40n1-2018005.