Bulletin of the Brazilian Mathematical Society, New Series
Bulletin of the Brazilian Mathematical Society, New Series > 2002 > 33 > 1 > 27-48
Bulletin of the Brazilian Mathematical Society, New Series > 2002 > 33 > 1 > 75-97
Bulletin of the Brazilian Mathematical Society, New Series > 2002 > 33 > 1 > 99-123
Bulletin of the Brazilian Mathematical Society, New Series > 2002 > 33 > 1 > 49-73
Bulletin of the Brazilian Mathematical Society, New Series > 2002 > 33 > 1 > 125-146