K. Choudhary, R., and J. Thakur. “Stability Constants of Hydrazine Carboxylic Acid Complexes With Some Bivalent Metal Ions ”. Asian Journal of Chemistry, vol. 2, no. 2, Mar. 2010, pp. 127-31, https://asianpubs.org/index.php/ajchem/article/view/25301.