By Freed-Brown Julian   Holden Matthew   Orrison Michael E.   Vrable Michael   in Mathematics Magazine

ISSN:1930-0980|85|1|44-50

Mathematical Association of America‎(2012)‎

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By Lawson Brian L.   Orrison Michael E.   Uminsky David T.   in Mathematics Magazine

ISSN:1930-0980|79|5|340-346

Mathematical Association of America‎(2006)‎

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By Daugherty Zajj   Eustis Alexander K.   Minton Gregory   Orrison Michael E.   in American Mathematical Monthly

ISSN:1930-0972|116|8|667-687

Mathematical Association of America‎(2009)‎

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