1. Anon 2002 Regulation (EC) No 178/2002 of the European Parliament and of the Council of 28 January 2002, article 18 www.food.gov.uk/multimedia/pdfs/1782002ecregulation.pdf
2. Anon 2006 Technical guidelines for Council Regulation (EC) No 21/2004 of 17 December 2003 http://archive.defra.gov.uk/foodfarm/farmanimal/movements/sheep/documents/eid-techguide-part1.pdf
3. Categorical Data Analysis
4. The implementation of traceability systems.;Ammendrup;Revue Scientifique et Technique - Office International des Epizooties,2006
5. Legislative requirements for the identification and traceability of farm animals within the European Union.;Ammendrup;Revue Scientifique et Technique - Office International des Epizooties,2001