1. Bailey, A. M., &Thomas, R. K. (1998). An investigation of oddity concept learning in rats.Psychological Record,48, 333–344.
2. Barsalou, L. W. (1992).Cognitive psychology: An overview for cognitive scientists. Hillsdale, NJ: Erlbaum.
3. Bourne, L. E. (1970). Knowing and using concepts.Psychological Review,77, 546–556.
4. Bowen, W. D., Read, A. J., &Estes, J. A. (2002). Feeding ecology. In A. R. Hoelzel (Ed.),Marine mammal biology: An evolutionary approach (pp. 217–246). Oxford: Blackwell.
5. Boyd, I. L. (1993).Marine mammals: Advances in behavioural and population biology. Oxford: Oxford University Press, Clarendon Press.