Sahu, K., and Rajeev Kumar Sahu. 2010. “Binuclear Complexes of Nickel(II) With the Ligand 1,2,5,6-Tetraphenyl-3,4-Diaza-1,6-Dihydrxyimino-2,4-Hexadine”. Asian Journal of Chemistry 7 (2):439-41. https://asianpubs.org/index.php/ajchem/article/view/24309.