Rangel Jiménez, A. E., & Portilla Salazar, C. J. (2016). The substitution process of heavy fuel oil with natural gas in the industrial sector of Valle del Cauca and Cauca – Colombia 2004-2012. Universidad Pedagógica y Tecnológica de Colombia.
Chicago-čujuhus (17. p.)Rangel Jiménez, Andrés Eduardo, juo Carlos Johnny Portilla Salazar. The Substitution Process of Heavy Fuel Oil with Natural Gas in the Industrial Sector of Valle Del Cauca and Cauca – Colombia 2004-2012. Universidad Pedagógica y Tecnológica de Colombia, 2016.
MLA-čujuhus (9. p.)Rangel Jiménez, Andrés Eduardo, juo Carlos Johnny Portilla Salazar. The Substitution Process of Heavy Fuel Oil with Natural Gas in the Industrial Sector of Valle Del Cauca and Cauca – Colombia 2004-2012. Universidad Pedagógica y Tecnológica de Colombia, 2016.
