Nijman I J, Lenstra J A, Schwerin M, Guérin G, Castiglioni B, Ferretti L, Olsaker I
Institute of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University.
Anim Genet. 1996 Oct;27(5):377-8. doi: 10.1111/j.1365-2052.1996.tb00992.x.