Piñeres, J., Barraza, J., Solarte, M., Orozco, M. and Colon, P. 2012. Kinetics of flotation of organic matter in Cerrejón coals (Guajira) using a flotation column. Ingeniería y Competitividad. 14, 2 (Jul. 2012), 103–109. DOI:https://doi.org/10.25100/iyc.v14i2.2658.