1. Retreat space and human visitor density moderate undesirable behavior in petting zoo animals;Anderson;J. Appl. Anim. Welfare Sci.,2002
2. A close keeper-nonhuman animal distance does not reduce undesirable behavior in contact yards goats and sheep;Anderson;J. Appl. Anim. Welfare Sci.,2004
3. Benefits of positive human interaction for socially housed chimpanzees;Baker;Anim. Welfare,2004
4. Effects of browse, human visitors and noise on the behaviour of captive orangutans;Birke;Anim. Welfare,2002
5. The influences of a camouflage net barrier on the behaviour, welfare, and public perceptions of zoo-housed gorillas;Blaney;Anim. Welfare,2004