Singh, Lakshman, Neelam Tyagi, Naresh P. Dhaka, and S.K. Sindhu. 2010. “Synthesis, Spectral and Thermal Studies of Some Lanthanide (III) Complexes of 4-[N-(Benzalidene) Amino] Antipyrine Thiosemicarbazone”. Asian Journal of Chemistry 11 (2):503-8. https://asianpubs.org/index.php/ajchem/article/view/23312.