Singh, Lakshman, Upma Singh, and Deepak K. Sharma. 2010. “Synthesis and Magneto-Spectral Studies of Cobalt(II) and Nickel(II) Complexes of 4[N-(p-Dimethylaminobenzalidene) Amino] Antipyrine Semicarbazone ”. Asian Journal of Chemistry 14 (1):484-88. https://asianpubs.org/index.php/ajchem/article/view/22044.