Synthesis and characterization of the BaTi'O IND.3' and 'Ba IND.0.975'Er IND.0.025'Ti'O IND.3' ceramic by the polymeric precursor method - Leyet-Ruiz, Y.; Guerrero, F.; Bernardi, Maria Inês Basso; M'Peko, Jean-Claude (Encontro Nacional de Física da Matéria Condensada - ENFMC, 2006)