TY  - JOUR 
T1  - Cyclotron mass of electrons in GaN-Al xGa1-xN heterostructures
JO  - Brazilian Journal of Physics
A1  - Oliveira, Solemar Silva
A1  - Souza, Marcio Adriano R.
A1  - Borges, Antonio Newton
A1  - Osório, Francisco A. Pinto
SN  - 0103-9733
UL  - 10.1590/S0103-97331999000400011
VL  - 29 
Y1  - 1999
PB  - Brasil 
ER  -