1. Untersuchungen uber eine spezifische, vitamin A-unabhangige wirkung des β-carotins auf die fertilitat des rindes. 5. Mitt. Organunterschungen-Gewichts und Gehaltsbestimmungen;Ahlswede;Dtch Tierarztl Wochenschr,1978
2. Relationship between vitamin A nd β-carotene levels during the postpartum period and fertility parameters in cows with and without retained placenta;Akar;Bull Vet Inst Pulawy,2006
3. Reproductive performance of lactating Holstein cows fed supplemental β-carotene;Akordor;J Dairy Sci,1986
4. Effects of timed insemination and supplemental I∼-carotene on reproduction and milk yield of heat-stressed dairy cows;Aréchiga;J Dairy Sci,1998
5. Seasonal variation in bovine luteal concentrations of β-carotene;Arikan;Turk J Anim Sci,2001