A. I. Abdullah, F. H. Musa, and H. A. Mohammad, “Synthesis and Studies of -bis ( Thiolethylsuphide-1, 3, 4- Oxadiazole-2yl) Ethane and it’s Complexes with (M (II): Cu, Ni, Co, Hg)”, RSCI, vol. 20, no. 1, pp. 75–89, Jan. 2009.