1. Ekman, T. 1998. A study of dairy herds with constantly low or constantly high bulk milk somatic cell count—with special emphasis on management. Acta Univ. Agric. Sueciae Veterinaria 32. Swed. Univ. Agric. Sci., Uppsala, Sweden.
2. The national Swedish animal disease recording system;Emanuelson;Acta Vet. Scand. Suppl.,1988
3. Nonlinear mixed model analyses of five production disorders of dairy cattle;Emanuelson;J. Dairy Sci.,1993
4. Dairy herd management types assessed from indicators of health, reproduction, replacement, and milk production;Enevoldsen;J. Dairy Sci.,1996
5. Interrelationships among production and clinical disease in dairy cattle: a review;Erb;Can. Vet. J.,1987