1. Animal Welfare;Duncan,1997
2. Assessing animal welfare: Different philosophies, different scientific approaches;Fraser;Zoo Biol.,2009
3. Understanding Animal Welfare: The Science in Its Cultural Context;Fraser,2008
4. Understanding animal welfare;Fraser;Acta Vet. Scand.,2008
5. A scientific conception of animal welfare that reflects ethical concerns;Fraser;Anim. Welfare,1997