By Sroysang Banyat   Wetzel John E.   Wichiramala Wacharin   in American Mathematical Monthly

ISSN:1930-0972|115|1|61-65

Mathematical Association of America‎(2008)‎

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By Panraksa Chatchawan   Wetzel John E.   Wichiramala Wacharin   in Discrete & Computational Geometry

ISSN:0179-5376|37|2|297-299

Springer Publishing Company ‎(2007)‎

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