B. MAHAPATRA , BIPIN, and A.S.P. MISHRA. 2010. “Complexes of Mn(II), Co(II), Ni(lI), Cu(II), Zn(II), Cd(lI),and Hg(II) With Donor ChelatingTetradentate Ligands”. Asian Journal of Chemistry 10 (3):610-12. https://asianpubs.org/index.php/ajchem/article/view/23688.