1. Observations on the seminal micropathology of bulls;Williams;Cornell Vet,1925
2. Semen quality tests and their relationship to fertility;Saacke,1972
3. Pregnancy rates in cows and heifers bred to bulls selected for semen quality;Wiltbank;Theriogenology,1986
4. Influence of abnormal sperm morphology on conception rates in cattle;Barth;Proc Soc Theriogenol,1989
5. Genetic and non-genetic contributions to variation in spermatozoal morphology of mature Holstein bulls;Chandler,1990