Kumar Rastogi, Rahul, et al. “Preparation, Characterization and Antimicrobial Properties of Some Vanadium(III) and Manganese(III) Complexes of Schiff Bases”. Asian Journal of Chemistry, vol. 21, no. 8, Mar. 2010, pp. 6144-8, https://asianpubs.org/index.php/ajchem/article/view/12299.