K. Naik, Ganpat, and Jayant S. Budkuley. “Synthesis, Spectral and Thermal Properties of Na K-Nickel Nitrilotriacetate Hydrazinates”. Asian Journal of Chemistry, vol. 8, no. 4, July 2012, pp. 687-92, https://asianpubs.org/index.php/ajchem/article/view/24172.