1. UK Non-Native Organism Risk Assessment Scheme User Manual;Baker,2005
2. Baker, R.H.A., Macleod, A., Sansford, C.E., 1999. Pest risk analysis: the UK experience. Proceedings of the Fifth International Conference on Pests in Agriculture Part I, pp. 119–126.
3. Bigsby, H.R., 2002. Quantifying Phytosanitary barriers to trade in the US Paper presented at the International Agricultural Trade and Policy Conference, Univeristy of Florida, Gainsville. November 14–15, 2002, 16pp.
4. Guidelines for Import Risk Analysis: September 2001,2001
5. Evaluating methods for assessing extinction risk;Burgman;Acta Oecologica,2004