Effect of alpha tocopheryl acetate on cryopreserved semen quality of Bos taurus bulls raised under tropical environments - Góes, P. A. A; Nichi, Marcilio; Perez, E. G. A; Silva, R. O. C; Rodrigues, M. P; Dalmazzo, A; Rocha, C. C; Barnabé, Renato Campanarut; Bertolla, R. P; Barnabe, Valquiria Hyppólito (International Ruminant Reproduction, 2010)