By Zobitz John   in The College Mathematics Journal

ISSN:1931-1346|44|5|421-424

Mathematical Association of America‎(2013)‎

Access to resources Favorite 18.24337

By Sorensen Jody   Zobitz John   in Math Horizons

ISSN:1947-6213|20|1|25-28

Mathematical Association of America‎(2012)‎

Access to resources Favorite 14.594695