Hernández Mora, J. A., and J. C. Acevedo Páez. “Producing Ethanol from Glycerin, a Biofuel by-Product, Using Saccharomyces Cerevisiae”. Ingeniería Solidaria, vol. 9, no. 16, Apr. 2014, pp. 97-101, doi:10.16925/in.v9i16.532.