Erythrocytes osmotic fragility of Zebu cattle (Bos indicus, L. 1758) bred in the São Paulo state of Brazil: influence of age, sex and several Nelore breed lines - Ayres, M. C. C; Birgel, Eduardo Harry; Birgel Júnior, Eduardo Harry; Mirandola, Regina Mieko Sakata; Gregory, Lilian; Biojone, Fernanda de Souza Meirelles (Congreso Mundial de Buiatria, 2000)