J. A. Gómez-Gómez, C. Giraldo-Estrada, D. Habeych, and S. Baena, “Evaluation of biological production of lactic acid in a synthetic medium and in Aloe vera (L.) Burm. f. processing by-products”, Universitas Scientiarum, vol. 20, no. 3, pp. 369–385, Nov. 2015.