1. ACI (2007) Annual report 2006. Airports Council International, Geneva
2. Beale R, Fairbrother J, Inglis A, Trebeck D (2008) One biosecurity: a working partnership. Commonwealth of Australia, Barton ACR
3. Belcher JW, Wilson SD (1989) Leafy spurge and the species composition of a mixed grass prairie. J Range Manage 42:172–175
4. Biosecurity Council (2003) Protect New Zealand. The biosecurity strategy for New Zealand. MAF, Wellington
5. Bomford M, Hart Q (2002) Non-indigenous vertebrates in Australia. In: Pimentel D (ed) Biological invasions: economic and environmental costs of alien plant, animal, and microbe species. CRC Press, New York, pp 25–44