1. World Health Organization (WHO). The medical impact of the use of antimicrobials in food animals. Report of WHO meeting, Berlin, Germany, 13–17 October 1997. Volumes 1 and 2: Report and background papers.
2. The use of antibiotics in food-producing animals: antibiotic-resistant bacteria in animals and humans,1999
3. Does the use of antibiotics in animals affect human health;Barton;Aust. Vet. J.,1998
4. An overview of microbial food safety risk assessment;Lammerding;J. Food Prot.,1998
5. Antimicrobial use in animal feed–time to stop;Gorbach;New Engl. J. Med.,2001