Biochemical characterization of calf sera used in the maintenance of cell cultures employed in virology - Tenorio, E C N; Fang, F L W; Akimura, O K; Yan, A F B; Derizzo, E; Strufaldi, B; Hirata, Mario Hiroyuki; Abdalla, Dulcinéia Saes Parra; Ishizuka, Masaio Mizuno (Encontro Nacional de Virologia, 1988)