F. López Rocafuerte, J. Fierro Aguilar, and R. Calero Córdova, “Decrease in chemical demand of oxygen (cod) in waste water of generated in an agrochemical industry”, Revista UG, vol. 121, no. 3, pp. 63–72, Sep. 2015, doi: 10.53591/rug.v121i3.392.