Umbarila-Ortega, María, Juan Prado-Rodríguez, and Rafael Agudelo-Valencia. 2019. “Sulfide Removal Using Ozone As an Oxidizing Agent in Tannery Wastewater”. Revista Facultad De Ingeniería 28 (51), 25-38. https://doi.org/10.19053/01211129.v28.n51.2019.9081.