1. Das intrauterine Geschlechter-Verhältnis beim Rind;Baier;Berliner und Münchener Tierärztliche Wochenschrift.,1965
2. Variation in sex ratio between progeny groups in dairy cattle;Bar-Anan;Theoretical and Applied Genetics,1975
3. Embryonic death in cattle, sheep and pigs;Boyd;Vet. Bull.,1965
4. Gest-achtsverhounding van Kalveren bej de geboorte (Sex ratio at birth in cattle);Brands;Tijdschr. Diergeneesk. deel.,1965
5. Sex ratios of fetal calves;Chapman;Amer. Soc. Anim. Prod.,1938