1. Population Biology of Infectious Diseases,1982
2. Animal Movements and Disease Risk: A Workbook;Armstrong,2002
3. Isolation of Salmonellae from seals in UK waters;Baker;Veterinary Record,1995
4. Assessing the risks of infectious diseases in captive-breeding and reintroduction programmes;Ballou;Journal of Zoo and Wildlife Medicine.,1993
5. Designing the ark: setting priorities for captive breeding;Balmford;Conservation Biology,1996