1. A prospective study of sow mortality in breeding herds;Chagnon;Can. J. Vet. Res.,1991
2. Causes of mortality among sows in Danish pig herds;Christensen;Vet. Rec.,1995
3. Culling and mortality in breeding animals;D'Allaire,1992
4. Culling patterns in selected Minnesota swine breeding herds;D'Allaire;Can. J. Vet. Res.,1986
5. The cause of sow mortality: a retrospective study;D'Allaire;Can. Vet. J.,1991