*Hull, D. L., R. Langman and S. Glenn (2001) "A general account of selection: biology, immunology and behavior" "Behavioral and Brain Sciences" 24 (3): 511–528.
* (2001) Hull, D. L., R. Langman and S. Glenn (2001) «A general account of selection: biology, immunology and behavior» "Behavioral and Brain Sciences" 24 (3): 511—528.