By Stergiou V.   Patronis T.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|33|5|651-659

Taylor & Francis Ltd‎(2002)‎

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By Karakonstantis J.   Patronis T.   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|41|3|341-349

Taylor & Francis Ltd‎(2010)‎

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