1. Almog, J., Perry, J., & Wettstein, H. (1989). Themes from Kaplan. Oxford.
2. Innateness and emergentism;Bates,1999
3. On necessary and specific capabilities in evolution and development;Bickhard;Human Development,1979
4. Cognition, convention, and communication;Bickhard,1980
5. The social nature of the functional nature of language;Bickhard,1987