1. Report of the Joint Committee on the Use of Antibiotics in Animal Husbandry and Veterinary Medicine;Swann,1969
2. Resistance to antibiotics and other antimicrobial agents. Chairman Lord Soulsby;House of Lords Select Committee on Science and Technology. Session 1997–8, 7th Report
3. Fluoroquinolone resistance;Piddock;BMJ,1998
4. Sales of Antimicrobial Products Authorised for Use as Veterinary Medicines Antiprotozoals, Antifungals, Growth Promoters and Coccidiostats in the UK in 2005;Veterinary Medicines Directorate 2006