Sharmeli, Y., and R.K. Lonibala. “Complex Formation of N’-[4-(dimethylamino)phenyl]methylene Isonicotinohydrazide With Lanthanide Ions in Water-Dioxane Medium and the Associated Thermodynamics”. Asian Journal of Chemistry, vol. 22, no. 10, July 2010, pp. 7541-50, https://asianpubs.org/index.php/ajchem/article/view/12018.