Ferenc, W.; Osypiuk, D.; Sarzyński, J.; Głuchowska, H. Complexes of Mn(II), Co(II), Ni(II), Cu(II) and Zn(II) With Ligand Formed by Condensation Reaction of Isatin With Glutamic Acid. Eclet. Quim. 2020, 45, 12-27.