Laitinen, J. (1983). Oestrus confirmation, pregnancy diagnosis and postpartum ovarian follow-up of the Finnish dairy cows by milk progesterone assay: Effects of breed, season, feed and sampling on milk progesterone levels. University of Kuopio.
Lua i Stíl Chicago (17ú heag.)Laitinen, Jarmo. Oestrus Confirmation, Pregnancy Diagnosis and Postpartum Ovarian Follow-up of the Finnish Dairy Cows by Milk Progesterone Assay: Effects of Breed, Season, Feed and Sampling on Milk Progesterone Levels. Kuopio: University of Kuopio, 1983.
Lua MLA (8ú heag.)Laitinen, Jarmo. Oestrus Confirmation, Pregnancy Diagnosis and Postpartum Ovarian Follow-up of the Finnish Dairy Cows by Milk Progesterone Assay: Effects of Breed, Season, Feed and Sampling on Milk Progesterone Levels. University of Kuopio, 1983.