Synthesis, characterization and structure of lanthanide nitrate complexes with 2-azacyclononanone (AZA) - Melo, Dulce Maria de Araújo; Fernandes, J. D. Gomes; Zinner, Klaus; Zinner, Lea Barbieri; Souza, H. K. Silva de; Zukerman-Schpector, Júlio; Vicentini, Geraldo (Rare Earth Research Conference, 1999)