00377nam a2200145 a 450000500170000002000150001708200170003210000280004924500370007725000080011426000290012230000250015149000330017670000220020920251203110503.0  a3540781188  a515.076bSOU  aDe Souza, Paulo Ney and  aBerkeley Problems in Mathematics  a2nd  aNew YorkbSpringerc2001  axiv,535p.c22 cm. PB  aProblem Books in Mathematics  aSilva, Jorge-Nuno