Sahu, K. and Thakur, R. 2010. Binuclear Macrocyclic Complexes of Ni(II), Co(II), Fe(II) and Cu(II) with 3,4,7,8,14,15,18,19, Octaphenyl 1,2,5,6,9, 10,12,13,16,17,20,21-dodecaaza-Cyclobicosa-3,4,7,8,14,15,18,19-Octaene . Asian Journal of Chemistry. 4, 3 (Mar. 2010), 444–446.