1. Alexander SL, Irvine CHG, Turner JE: Comparison by three different radioimmunoassay systems of the polymorphism of plasma FSH in mares in various reproductive states. J. Reprod. Fert., 1987, Suppl. 35, 9–18.
2. Anonymous: Council Directive 92/118/EEC of 17 December 1992 laying down animal health and public health requirements governing trade in and imports into the Community of products not subject to the said requirements laid down in specific Community rules referred to in Annex A (I) to Directive 89/662/EEC and, as regards pathogens, to Directive 90/425/EEC.
3. Bahnemann HG: Binary Ethylenimine as an Inacti-vant for Foot-and-Mouth Disease Virus and Its Apllication for Vaccine Production. Arch. Virol., 1975, 47, 47–56.
4. Bahnemann HG: Inactivation of Viruses in Serum with Binary Ethyleneimine. J. Clin. Microbiol., 1976, 3, 209–210.
5. Box GEP, Hunter WG, Hunter JS: Statistics for Experimenters, New York, U.S.A., John Wiley & Sons, Inc., 1978, 653pp.