1. Ongoing research on the causes of variation in calving performance and stillbirths in Swedish dairy cattle;Berglund;Interbull Bull.,1996
2. Berglund, B., and J. Philipsson. 1992. Increasing stillbirth rate in the Swedish Friesian population. 43rd Ann. Mtg. EAAP. 1992. Madrid, Spain.
3. Genetic aspects of beef production among Holstein-Friesians pedigree selected for milk production;Calo;J. Anim. Sci.,1973
4. Heritability of threshold characters;Dempster;Genetics,1950
5. Calving ease evaluation of French dairy bulls with a heteroskedastic threshold model;Ducrocq,2000