Citation

Oates J. E. , Bradshaw F. J. , Bradshaw S. D. Lonsdale R. A. (2002) Sex identification and evidence of gonadal activity in the short-beaked echidna (Tachyglossus aculeatus) (Monotremata : Tachyglossidae): non-invasive analysis of faecal sex steroids. Australian Journal of Zoology 50, 395-406.

https://doi.org/10.1071/ZO02017