2023. CHARACTERIZATION OF BIS-SALICYLALDEHYDE O-PHENYLENEDIAMINE SCHIFF BASE AND ITS DY(III), GD(III), ND(III) AND SM(III) LANTHANOIDS COMPLEXES. FUDMA JOURNAL OF SCIENCES. 7, 1 (Feb. 2023), 19–23. DOI:https://doi.org/10.33003/fjs-2023-0701-1226.