K. Dawood, S., A. Hassen, I. and Y. Yousif, T. (2006) “Synthesis and Characterization of Tetradentat Macrocyclic Ligands and its Complexes with Mn(II),Fe(II),Co(II),Ni(II) and Cu(II) Metal Ions”, Journal of Education and Science, 18(2), pp. 1–10. doi: 10.33899/edusj.2006.79265.