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- Nineteenth International Conference for the Psychology of Mathematics Education, page 264-271. Recife, Brazil, Program Committee of the 19th PME Conference, (1995)
- Nineteenth International Conference for the Psychology of Mathematics Education, page 256-263. Recife, Brazil, Program Committee of the 19th PME Conference, (1995)
- Educational Studies in Mathematics (1999)
- Radical constructivism in mathematics education, Kluwer, Netherlands, (1991)


