1. Evolving Brains;Allman,1998
2. Biological Handbook: Growth Including Reproduction and Morphological Development;Altman,1962
3. Spatial and social cognition in corvids: an evolutionary approach;Balda,2002
4. Creative or created: using anecdotes to investigate animal cognition;Bates;Methods,2007
5. Animal Tool Behaviour: The Use and Manufacture of Tools by Animals;Beck,1980