AL-Hamdiny, Z. M. Synthesis and Characterization Studies of Complexes of Co(III), Ni(II), Cu(II), Zn(II),Cd(II) and Hg(II) With New Azo Ligand 2-[2--(6-Methyl benzothiazolyl)azo]-4-Hydroxy Phenol. QJPS 2017, 18, 81-90.