1. Epidemiological features and economical importance of bovine virus diarrhoea virus (BVDV) infections;H Houe;Vet Microbiol,1999
2. Cattle [Internet]. NADIS—National Animal Disease Information Service -. [cited 2017Aug1]. Available from: http://www.nadis.org.uk/livestock/cattle.aspx
3. The clinical syndromes caused by Salmonella infection;M Anderson;Vet Med,1989
4. Bolin CA, Alt DP, Clinical signs, diagnosis, and prevention of bovine leptospirosis. In: Caple, I.W. (Ed.), Proceedings of the XX World Association for Buiatrics Congress, Sydney. 1998; 899–904.
5. Probability of and risk factors for introduction of infectious diseases into Dutch SPF dairy farms: a cohort study;GV Schaik;Pre Vet Med,2002