By Beals Robert   in American Mathematical Monthly

ISSN:1930-0972|116|10|923-926

Mathematical Association of America‎(2009)‎

Access to resources Favorite 16.578026

By Beals Robert   Wetherell Joseph   Zieve Michael   in Israel Journal of Mathematics

ISSN:0021-2172|174|1|93-117

Springer Publishing Company ‎(2009)‎

Access to resources Favorite 9.9468155