Syedd-León, R., M. Sandoval-Barrantes, H. Trimiño-Vásquez, L. Villegas-Peñaranda, and G. Rodríguez-Rodríguez. “Revisiting the Fundamentals of P-Nitrophenol Analysis for Its Application in the Quantification of Lipases Activity. A Graphical Update.”. Uniciencia, Vol. 34, no. 2, July 2020, pp. 31-43, doi:10.15359/ru.34-2.2.