Han, Jixun, Xucan Cai, Guoxin Sun, and Yu Cui. 2018. “Effect of Structure on Extraction Behavior of Praseodymium With a Series of Unsymmetrical Diglycolamides from Hydrochloric Acid”. Journal of the Serbian Chemical Society 83 (9). Belgrade, Serbia:969–980. https://doi.org/10.2298/JSC171109043H.