Thakur, S., Brat Singh, S., & Kumar, S. (2010). Synthesis and Characterization of Co(II), Ni(II) and Cu(II) Complexes with a Macrocyclic Ligand 5,7,12,14-Tetramethyldibenzo (b, i)-1,4,8,11-Tetraaza Cyclotetra Dec-2,4,6,9,11,13-Hexaene. Asian Journal of Chemistry, 13(3), 1001–1005. Retrieved from https://asianpubs.org/index.php/ajchem/article/view/22726