S. ORABI, ADEL, H.K. IBRAHIM, EL-SAYED H. EL-TAMANY, and A. RADWAN. 2010. “Studies of Some New Biologically Active Ligands and Their Complexes Derived from Some Transition Metal Ions”. Asian Journal of Chemistry 20 (3):2022-36. https://asianpubs.org/index.php/ajchem/article/view/19191.