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Hiroshi Fujita, Yoshihiko Hashimoto, Bernard R Hodgson, Peng Yee Lee, Steve Lerman
E-bok. Springer Netherlands, USA, 2007.
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Proceedings of the Ninth International Congress on Mathematical Education
Hiroshi Fujita, Yoshihiko Hashimoto, Bernard R Hodgson, Peng Yee Lee, Steve Lerman
Springer-Verlag New York Inc., USA, 2004.
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