Li, Xing, Jun Li, Yang Jin, Ming Chen, Dongya Feng, and Yunhai Guo. 2017. “Wet Process of Phosphoric Acid Purification by Solvent Extraction Using Tri-N-Butyl Phosphate and Cyclohexanol Mixtures”. Journal of the Serbian Chemical Society 82 (5). Belgrade, Serbia:579-92. https://doi.org/10.2298/JSC161028019L.