Citation: U. Bottger et al., SYNTHESIS AND ELECTROCHEMISTRY OF MONONUCLEAR AND BINUCLEAR EUROPIUM COMPLEXES WITH THE MACROCYCLIC LIGAND AZACYCLOHEXACOSANE-1,4,7,10,14,17,20,23-OCTAACETIC ACID (OHEC), Inorganica Chimica Acta, 231(1-2), 1995, pp. 29-34