Spectroscopic and thermoanalytical studies of the tetrakis (benzyl-t-butyl sulfoxide) europium (iii) picrate - Melo, W C; Zinner, Lea Barbieri; Matos, Jivaldo do Rosário; Zinner, Klaus; Isolani, Paulo Celso; Zain, M H; Vicentini, Geraldo (Latin-American Inorganic Chemistry Meeting, 1993)