Reitt, K., Hilbe, M., Voegtlin, A., Corboz, L., Haessig, M., Pospischil, A. (2007)Aetiology of bovine abortion in Switzerland from 1986 to 1995–a retrospective study with emphasis on detection of Neospora caninum and Toxoplasma gondii by PCR, J Vet Med A Physiol Pathol Clin Med. , 54(1), pp. 15-22.