By Shi Yixun   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|40|3|427-434

Taylor & Francis Ltd‎(2009)‎

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By Shi Yixun   in The College Mathematics Journal

ISSN:1931-1346|41|5|404-405

Mathematical Association of America‎(2010)‎

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By Evans Ryan   Lindner Brett   Shi Yixun   in International Journal of Mathematical Education in Science and Technology

ISSN:1464-5211|42|5|697-704

Taylor & Francis Ltd‎(2011)‎

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