Possibility of Construction for Initiation to Geometrical Reasoning. Proceedings of the 32th mathematics Education Conference of J.S.M.E. 1999. 209-214
Investigation on Pupil/Student's Spatial Thinking. Proceedings of the 32th mathematics Education Conference of J.S.M.E. 1999. 263-268
Possibility of Construction for Initiation to Geometrical Reasoning. Proceedings of the 32th mathematics Education Conference of J.S.M.E. 1999. 209-214