Carlsson U (1991). "Border disease in sheep caused by transmission of virus from cattle persistently infected with bovine virus diarrhoea virus". Vet. Rec. 128 (7): 145–147. doi:10.1136/vr.128.7.145. PMID1851350. S2CID34431498.
Carlsson U (1991). "Border disease in sheep caused by transmission of virus from cattle persistently infected with bovine virus diarrhoea virus". Vet. Rec. 128 (7): 145–147. doi:10.1136/vr.128.7.145. PMID1851350. S2CID34431498.
Carlsson U (1991). "Border disease in sheep caused by transmission of virus from cattle persistently infected with bovine virus diarrhoea virus". Vet. Rec. 128 (7): 145–147. doi:10.1136/vr.128.7.145. PMID1851350. S2CID34431498.