Aslam Khan, Azhar, and Narendra K. Sharma. 2010. “Synthesis and Physico-Chemical Investigations of Some Seven Coordinated Complexes of Lanthanides(III) Chloride Derived from Hydrazones of Isonicotinic Acid Hydrazide”. Asian Journal of Chemistry 20 (7):4969-79. https://asianpubs.org/index.php/ajchem/article/view/12831.