M. Patil, Raju, and Shivkumar R. Chaurasiya. “Synthetic, Structural, Thermal and Biological Studies of Zr(IV), Th(IV) and VO(IV) Chelates With Bis-Bidentate Schiff Bases”. Asian Journal of Chemistry, vol. 20, no. 6, Mar. 2010, pp. 4615-24, https://asianpubs.org/index.php/ajchem/article/view/19072.