Defining issues of space in zoos

References 

1. Baratay E, Hardouin-Fugier E. Zoo: a history of zoological gardens in the West. (English language translation by Oliver Welsh.). London: Reaktion Books; 2002;
2. Diamond J. Guns, germs and steel: a short history of everybody for the last 13000 years. Great Britain: Jonathan Cape; 1998;
3. Hediger H. Man and animal in the zoo: zoo biology. (English language translation by Gwynne Vevers and Winwood Reade.). London: Routledge and Kegan Paul Ltd; 1969;
4. Seidensticker J, Doherty JG. Integrating animal behavior and exhibit design. In:  Kleiman D,  Alen M,  Thompson K,  Lumpkin S,  Harris H editor. Wild mammals in captivity principles and techniques. Chicago, IL: University of Chicago Press; 1996;
5. Sukumar R. The living elephants: evolutionary ecology, behavior and conservation. New York: Oxford University Press; 2003;
6. World Association of Zoos and Aquariums . The world zoo and aquarium conservation strategy. Berne: WAZA Executive Office; 2005;