Reference Base Metabolism and excretion of oestradiol-17B and progestero...
Heistermann, M.; Agil, M.; Buethe, A.; Hodges, J.J., 1998. Metabolism and excretion of oestradiol-17B and progesterone in the Sumatran rhinoceros (Dicerorhinus sumatrensis). Animal Reproduction Science 53: 157-172, figs. 1-4, tables 1-2