A.K. Al-Allaf, Talal, et al. “Synthesis and Characterization of Homo and Hetero Multi-Nuclear Complexes of Platinum Group Metals With Some New Tetrasubstituted Thioethene Derivatives”. Asian Journal of Chemistry, vol. 12, no. 2, Mar. 2010, pp. 527-36, https://asianpubs.org/index.php/ajchem/article/view/22991.