Piñeres, Jorge L., and Juan M. Barraza. “Effect of PH, Air Velocity, and Frother Concentration on the Flotation Kinetics of Four Colombian Coals”. Ingeniería y Competitividad 10, no. 2 (June 9, 2008): 29–40. Accessed November 22, 2024. https://revistaingenieria.univalle.edu.co/index.php/ingenieria_y_competitividad/article/view/2472.