Swami, V.K., S.P. Mathur, and R.P. Tyagi. “Potentiometric Determination of Stability Constants of Rare-Earth Chelates of 1-Phynyl-1-Hydroxy-3-Phynyl-2-Thiourea ”. Asian Journal of Chemistry 4, no. 2 (March 30, 2010): 395–396. Accessed July 24, 2024. https://asianpubs.org/index.php/ajchem/article/view/25060.