By Geroldinger Alfred   Yuan Pingzhi   in Bulletin of the London Mathematical Society

ISSN:0024-6093|44|6|1203-1208

Oxford University Press‎(2012)‎

Access to resources Favorite 15.514962

By Saltzman Peter W.   Yuan Pingzhi   in American Mathematical Monthly

ISSN:1930-0972|115|3|254-261

Mathematical Association of America‎(2008)‎

Access to resources Favorite 12.661937