1. Beyer, B. K. (1984). Improving thinking skills — Defining the problem.Phi Delta Kappan, 65 486–490.
2. Bloom, B. S. (Ed.) (1956).Taxonomy of educational objectives handbook I: Cognitive domain. New York: David McKay.
3. Bradbard, M. R. & Endsley, R. C. (1982). How can teachers develop young children's curiosity? What current research says to teachers. In J. F. Brown (Ed.),Curriculum planning for young children. Washington, D.C.: National Association for the Education of Young Children.
4. Brown, A. L. (1982). Learning and development: The problem of compatibility, access, and induction.Human Development, 25 89–115.
5. Brown, A. L., Bransford, J. D., Ferrara, R. A., & Campione, J. C. (1983). Learning, remembering, and understanding. In P. H. Mussen (Ed.),Handbook of child psychology. NY: Wiley.