R. Hofmann

Reproductive assessment of male elephants (Loxodonta africana and Elephas maximus) by ultrasonography.

T. Hildebrandt, F. Göritz, J. Raath, 1998, Journal of zoo and wildlife medicine : official publication of the American Association of Zoo Veterinarians.

Seasonal timing of sperm production in roe deer: interrelationship among changes in ejaculate parameters, morphology and function of testis and accessory glands.

T. Hildebrandt, A. Wagener, S. Blottner, 2003, Theriogenology.

Functional Anatomy of the Omasum in High Arctic Svalbard Reindeer (Rangifer tarandus platyrhynchus) and Norwegian Reindeer (Rangifer tarandus tarandus)

N. Tyler, S. Mathiesen, W. Sørmo, 2000, Acta Veterinaria Scandinavica.