A. O. Zulfigarov, A. A. Andriiko, S. V. Kovalchyk, A. G. Grebenyuk, I. S. Kuzevanova, and V. A. Potaskalov, “Spectroscopic study of complex compounds of cobalt(III) - nikel(II) with monoethanolamine”, Khark. Univ. Bull. Chem. Ser., no. 28, pp. 90-95, Jun. 2017.