Synthesis, characterization and structure of lanthanide nitrate complexes with 2-azacyclononanone (AZA) - Souza, H K Silva de; Araújo Melo, D M; Fernandes, J D Gomes; Zinner, Klaus; Zinner, Lea Barbieri; Zukerman-Schpector, Júlio; Vicentini, Geraldo (Journal of Alloys and Compounds, 2000)