1. Environmental enrichment, immunocompetence, and resistance to Babesia microti in male mice;Barnard;Physiol. Behav.,1996
2. Effects of captivity on the behaviour of wild mammals;Carlstead,1996
3. Alleviating stress in zoo animals with environmental enrichment;Carlstead,2000
4. Effects of environmental enrichment on reproduction;Carlstead;Zoo Biol.,2005
5. Environmental enrichment: a review;Chamove;Anim. Technol.,1989