TY  - JOUR 
T1  - Foreword
JO  - Brazilian Journal of Physics
A1  - Menezes, Débora Peres
A1  - Donangelo, Raul José
SN  - 0103-9733
UL  - 10.1590/S0103-97332003000200001
VL  - 33 
Y1  - 2003
PB  - Brazil 
ER  -