E. Ropstad
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Ovarian Activity in Ultrasound Image and Milk Progesterone Concentration in Postpartum Dairy Cows
R. Doležel, K. Karlberg, E. Ropstad
1993, Vol. 62, Issue 3-4, pp. 173-178 -
Ultrasound Observations of Ovarian Structures in Cows during Intravaginal Progesterone Device Application and in the Sexual Cycle following Parturition
R. Doležel, K. Karlberg, E. Ropstad, Kristina Landsverk
1993, Vol. 62, Issue 3-4, pp. 179-185