By Dence Thomas P.   Dence Joseph B.   in Mathematics Magazine

ISSN:1930-0980|82|4|255-265

Mathematical Association of America‎(2009)‎

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By Dence Joseph B.   Dence Thomas P.   in The College Mathematics Journal

ISSN:1931-1346|41|2|134-144

Mathematical Association of America‎(2010)‎

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By Bruckman Paul   Dence Joseph B.   Dence Thomas P.   Young Justin   in The College Mathematics Journal

ISSN:1931-1346|44|3|177-184

Mathematical Association of America‎(2013)‎

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