1. Allen, C. (1992). Mental content. British Journal for the Philosophy of Science, 43, 537–553.
2. Bechtel, W., Abrahamsen, A., & Graham, G. (1998). The life of cognitive science. In W. Bechtel & G. Graham (Eds.), A companion to cognitive science. Malden: Blackwell Publishers.
3. Bekoff, M., & Allen, C. (1997). Cognitive ethology: Slayers, skeptics, and proponents. In R. Mitchell, N. S. Thompson, & H. L. Miles (Eds.), Anthropomorphism, anecdotes, and animals (pp. 313–334). Albany: SUNY Press.
4. Call, J., & Tomasello, M. (2008). Does the chimpanzee have a theory of mind? 30 years later. Trends in Cognitive Sciences, 12(5), 187–192.
5. Chomsky, N. (1967). Preface to ‘A review of Skinner’s Verbal Behavior’. In L. A. Jakobovits & M. S. Miron (Eds.), Readings in the psychology of language. Englewood Cliffs: Prentice Hall.