“Synthesis and Characterization of Macrocyclictetradentate Ligand Type N2o2 and Its Complexes With (Co(Ii), Ni(Ii) And Pd(Ii))”. 2018. Al-Nahrain Journal of Science 15 (1): 25-34. https://mail.anjs.edu.iq/index.php/anjs/article/view/1540.