TY  - JOUR 
T1  - XXV Brazilian National Meeting on particles and fields
JO  - Brazilian Journal of Physics
A1  - Silva, Adilson José da
SN  - 0103-9733
UL  - 10.1590/S0103-97332006000200001
VL  - 36 
Y1  - 2006
PB  - Brasil 
ER  -