1. Bendixen, P. H. 1988. Risk indicators of disease occurrence in dairy cows in Sweden. Ph.D. Diss. Rep. 18, Swedish Univ. Agric. Sci. Dep. Anim. Hygiene, Uppsala, Sweden.
2. The enigma of herd: comparison of different models to account for group effects in multiple logistic regression analysis;Curtis;Acta Vet. Scand. Suppl.,1988
3. Heritability of threshold characters;Dempster;Genetics,1950
4. Ordered categorical sire evaluation for dystocia in Holsteins;Djemali;J. Dairy Sci.,1987
5. The National Swedish animal disease recording system;Emanuelson;Acta Vet. Scand. Suppl.,1988