Kumar, Mithilesh, R.J. Prasad, and Supriti Bhattacharya. 2010. “Synthesis and Structural Behaviour of Schiff Base Complexes Derived from Vanillin and Aliphatic Diamines”. Asian Journal of Chemistry 7 (3):527-32. https://asianpubs.org/index.php/ajchem/article/view/24353.