TY  - JOUR 
T1  - Non-twist field line mappings for tokamaks with reversed magnetic shear
JO  - Brazilian Journal of Physics
A1  - Roberto, M.
A1  - Silva, E. C. da
A1  - Caldas, I. L.
A1  - Viana, R. L.
SN  - 0103-9733
UL  - 10.1590/S0103-97332004000800046
VL  - 34 
Y1  - 2004
PB  - Brasil 
ER  -