L. Sliusarchuk, L. Zheleznova, and A. Mishchenko, “MIXED-LIGAND ACETYLACETONATE COMPLEXES OF LANTANUM (III) AND GADOLINIUM (III) WITH CARBOXYLIC ACIDS AND ACETONITRILE OR DIMETHYLFORMAMIDE”, Ukr. Chem. Journ., vol. 85, no. 1, pp. 3–12, Apr. 2019.