9Veerhuis R, Hendriksen P J, Hengst A M, et al. The production of anti-H-Y monoclonal antibodies:their potential use in a sex test for bovine embryos[ J]. Vet Immunol Immunopathol, 1994,42 (3 - 4):317 -330.
10Schroder A, Miller J, Thomsen P, et al. Sex determination of bovine embryos using the polymerase chain reaction [J]. Animal biotechnol. 1991.1: 121 - 133.