MAHAPATRA, B. B., D. SATYANARAYAN, and A. BElIERA. “?POLYMETALLIC COMPLEXES Part-XLV. Complexes of Co (II), Ni (II), Cu (II), Zn (II), Cd (II) and Hg (II) With Bis-Bidentate Chelating Diazo Dye Ligands”. Biological Sciences - PJSIR, vol. 37, no. 1-2, Jan. 1994, pp. 37-39, https://v2.pjsir.org/index.php/biological-sciences/article/view/2567.