Sex determination of Bos indicus (Nelore cattle) preimplantation embryos using the polymerase chain reaction - Garcia, J. F.; Nogueira, M F G; Pupim, F P V; Sekiguchi, S; Oliveira, Cláudio Alvarenga de; Visintin, Jose Antonio (International Symposium on Reproduction in Domestic Ruminants, 1994)