1. Carey, S. (1991). Knowledge acquisition: Enrichment or conceptual change? In S. Carey & R. Gelman (Eds.), The epigenesis of mind (pp. 257–291). Hillsdale, NJ: Lawrence Erlbaum Associates
2. Carey, S. (1985). Conceptual change in childhood. Cambridge, Mass, MIT Press.
3. Chi, M. T. H. (1992). Conceptual change within and across ontological categories: Examples from learning and discovery in science. In R. Giere (Ed.), Cognitive models of science: Minnesota Studies in the Philosophy of Science, (pp. 129–186). University of Minnesota Press: Minneapolis, MN.
4. Chi, M. T. H. (1997). Creativity: Shifting across ontological categories flexibly. In T.B. Ward, S.M. Smith, R.A. Finke & J. Vaid (Eds.), Creative thought: An investigation of conceptual structures and processes. (pp. 209–234). Washington, DC: American Psychological Association.
5. Chi, M. T. H. (2000a). Cognitive understanding levels. In: Encyclopedia of Psychology, Vol. 2, Kazdin, A.E. (Ed.). Pp 172–175, Oxford University Press.