Prakash, D., et al. “Alkaline Earth Metal Complexes: Mixed Ligand Complexes of Alkaline Earth Metal Salts of Some Organic Acids With Naturally Occurring Substrate ”. Asian Journal of Chemistry, vol. 8, no. 1, Mar. 2010, pp. 115-9, https://asianpubs.org/index.php/ajchem/article/view/24027.