1. Study of Formal Reasoning Patterns by Means of Three Piagetian Tasks: Implications for Science Education
2. & (1980). Formal thinking, physics concepts and misconcepts: An experimental study. In & , (Eds.), Proceedings of the International Conference on Education for Physics Teaching, Trieste, Italy. Edinburgh: I.C.P.E. Physics Department, University of Edinburgh.
3. (1956). Taxonomy of educational objectives. Book 1: Cognitive domain. New York: McKay.