Pickard, A. 2003. Reproductive and welfare monitoring for the management of ex situ populations. In: Holt, W.V., Pickard, A.R., Rodger, J.C., Wildt, D.E. (eds), Reproductive science and integrated conservation: pp. 132-146.
Strike, T.; Pickard, A. 2000. Non-invasive hormone analysis for reproductive monitoring in female southern white rhinoceros (Ceratotherium simum simum). Proceedings of the 2nd Annual Symposium on Zoo Research, 6-7 July 2000, Paignton Zoo: pp. 191-197.
Garnier, J.N.; Holt, W.V.; Pickard, A.; Green, D.; Shaw, H. 1998. Steroid stability in the faeces of wild black rhinoceros (Diceros bicornis). Proceedings of the Euro-American Mammal Congress, Santiago de Compostela, Spain 1998: 68.
Garnier, J.N.; Green, D.; Pickard, A.; Shaw, H.; Holt, W.V. 1998. Non-invasive diagnosis of pregnancy in wild black rhinoceros Diceros bicornis minor by faecal steroid analysis. Reproduction, Fertility and Development 10: 451-458.






