A. AL-Jibouri, Subhi, et al. “Synthesis and Characterization of Some Mercury(II) Complexes With Phosphine Oxide, Sulphide and Mixed Ligands ”. Asian Journal of Chemistry, vol. 7, no. 3, Mar. 2010, pp. 471-4, https://asianpubs.org/index.php/ajchem/article/view/24333.