By Deaconescu Marian   Walls Gary   in Archiv der Mathematik

ISSN:0003-889X|92|3|200-205

Springer Publishing Company ‎(2009)‎

Access to resources Favorite 17.371489

By Deaconescu Marian   Walls Gary L.   in American Mathematical Monthly

ISSN:1930-0972|118|5|452-455

Mathematical Association of America‎(2011)‎

Access to resources Favorite 14.114077