1. Protozoal causes of reproductive failure in domestic ruminants;Anderson;Veterinary Clinics of North America: Food Anim Prac,1994
2. The aspartic proteinases: An historical overview;Blundell,1998
3. Serum levels of progesterone estradiol and hydrocortisone in ewes after abortion due to Listeria monocytogenes type 5;Carter;Am J Vet Res,1976
4. Mechanism of immunosuppression of progesterone on maternal lymphocyte activation during pregnancy;Clemens;J Immunol,1979
5. Listeriosis, Veterinary Climcs of North America;Cooper;Food Anim Prac,1998