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2. Proceedings of the XVIII Psychology of Mathematics Education;M. C. Borba,1994
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4. Borba, M. C.: 1995a, ?Overcoming Limits of software tools: A student's solution for a problem involving transformation of functions?, in L.Meira et al (Editors) Proceedings of the XVIII Psychology of Mathematics Education (Vol. II, pp. 248?255), Recife, Brazil: UFPE.
5. Borba, M. C.: 1995b, ?What's new in teaching mathematics: computers in the classroom?, Clearing House 68(6), 333?334, D.C., U.S.A.