TY  - JOUR 
T1  - Handedness of direct photons
JO  - Brazilian Journal of Physics
A1  - Kopeliovich, B. Z.
A1  - Rezaeian, A. H.
A1  - Schmidt, Ivan
SN  - 0103-9733
UL  - 10.1590/S0103-97332008000400012
VL  - 38 
Y1  - 2008
PB  - Brazil 
ER  -