1. Update on cattle health schemes in the UK [correspondence];Brigstocke;Veterinary Record,2012
2. Defra 2010a Definitions of Terms Used in Farm Business Management http://archive.defra.gov.uk/foodfarm/farmmanage/advice/documents/def-of-terms.pdf
3. Defra 2010b Veterinary Surveillance: Goats http://archive.defra.gov.uk/foodfarm/farmanimal/diseases/vetsurveillance/species/goats.htm
4. Defra 2011 Review of the implementation of the Veterinary Surveillance Strategy www.gov.uk/government/uploads/system/uploads/attachment_data/file/69275/pb13568-vss-review-110204.pdf
5. Defra and Others 2013 Agriculture in the United Kingdom 2012 www.gov.uk/government/uploads/system/uploads/attachment_data/file/208436/auk-2012-25jun13.pdf