Bulla-Pereira, E. A., Guerrero-Fajardo, C. A., & Sierra-Vargas, F. E. (2015). Biodiesel production by ethanolysis using waste cooking oil from hotels for firetube boilers. ITECKNE, 12(1), 44–53. https://doi.org/10.15332/iteckne.v12i1.820