1. The construct of regression: A Piagetian approach;Bearison;Merrill-Palmer Quarterly,1974
2. Bower, T. G. R. Concepts of development. In Proceedings of the 21st International Congress of Psychology. Paris: Presses Universitaires de France, 1978.
3. Training and generalization of density conservation;Brainerd;Child Development,1971
4. On relational concepts;Bruner,1966
5. An analysis of cognitive-developmental sequences;Flavell;Genetic Psychology Monographs,1972