1. Andreu, A. C., 1987. Ecologia dinamica poblacional de la tortuga mora, Testudo graeca, en Doñana. Thesis doctoral, University of Seville.
2. Andreu, A.C., Diaz-Paniagua, C., Keller, C., 2000. La tortuga mora (Testudo graeca L.) en Doñana. Asociaciou Herpetologica Espanola, Monografias de Herpetologia, vol. 5.
3. Plant histology as an aid in squirrel food-habit studies;Baumgartner;Journal of Wildlife Management,1939
4. Observations on ecological changes threatening a population of Testudo graeca graeca in the Souss Valley, Southern Morocco;Bayley;Chelonian Conservation and Biology,1996
5. Food plant selection by a generalist herbivore : the moose;Belovsky;Ecology,1981