TY  - JOUR 
T1  - Collaborative tasks and learning occasions in English as a foreign language
JO  - Revista Brasileira de Linguística Aplicada
A1  - Lima, Marília dos Santos
SN  - 1984-6398
UL  - 10.1590/S1984-63982011000400003
VL  - 11 
Y1  - 2011
PB  - Brasil 
ER  -