By Bak Joseph   Ding Pisheng   in American Mathematical Monthly

ISSN:1930-0972|116|2|143-150

Mathematical Association of America‎(2009)‎

Access to resources Favorite 16.612055

By Bak Joseph   Ding Pisheng   Newman Donald   in American Mathematical Monthly

ISSN:1930-0972|114|6|540-546

Mathematical Association of America‎(2007)‎

Access to resources Favorite 12.459042