Synthesis and spectroscopic characterization of complexes of lanthanide picrates and dibenzylsulfoxide - Melo, W C; Astigarraga, R E B; Isolani, Paulo Celso; Zinner, Lea Barbieri; Zaim, M H; Vicentini, Geraldo; Zinner, Klaus (Anais da Associacao Brasileira de Quimica, 1995)