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 (17e ed.) BronvermeldingRangel Jiménez, Andrés Eduardo, en 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 (9e ed.) BronvermeldingRangel Jiménez, Andrés Eduardo, en 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.
