1. Current status of sperm cryopreservation: why isn't it better?;Medeiros C.;Theriogenology,2002
2. Storage of bull spermatozoa at low temperatures;Stewart D.;Vet. Rec.,1951
3. Preliminary fertility results with frozen bovine spermatozoa;Bratton R.;J. Dairy Sci.,1955
4. Basic aspects of frozen storage semen;Holt W.;Anim. Reprod. Sci.,2000
5. Advances in cooled semen technology;Batellier F.;Anim. Reprod. Sci.,2001