M. Wolf

[Sonography of pregnancy in sheep. II. Accuracy of transrectal and transcutaneous pregnancy diagnosis].

J. Schulz, W. Kähn, A. Richter, 1993, DTW. Deutsche tierarztliche Wochenschrift.

[Sonography during the pregnancy of sheep. I. Fetometry for the determination of the stage of gestation and prediction of the time of parturition].

J. Schulz, W. Kähn, A. Richter, 1992, DTW. Deutsche tierarztliche Wochenschrift.