H. Mohamed, E., and N. H. Buttrus. “Multinuclear Complexes of Co+2,Ni+2,Cu+2 and Sn+2With (o,o′-Diethyl Dithiophosphate)Tin(IV)”. Rafidain Journal of Science, vol. 17, no. 7, June 2006, pp. 15-24, doi:10.33899/rjs.2006.43645.