Ladds, P.

Hermes, R.; Hildebrandt, T.B.; Portas, T.J.; Goeritz, F.; Bryant, B.R.; Kretzschmar, P.; Walzer, C.; Schaffer, N.E.; Ladds, P.; Blottner, S. 2006. Testis and epididymis ultrasonography and fine-needle biopsy in the rhinoceros for tumor and fertility diagnosis. Proceedings of the European Association of Zoo- and Wildlife Veterinarians 2006: 1-2.

Portas, T.J.; Hermes, R.; Bryant, B.R.; Goeritz, F.; Ladds, P.; Hildebrandt, T.B. 2005. Seminoma in a southern white rhinoceros (Ceratotherium simum simum). Veterinary Record 157 (18): 556-558, figs. 1-3, table 1.