TY  - JOUR 
T1  - The role of explicit instruction in the acquisition of the present perfect
JO  - Revista Brasileira de Linguística Aplicada
A1  - Finger, Ingrid
A1  - Vasques, Fábio de Oliveira
SN  - 1984-6398
UL  - 10.1590/S1984-63982010000400002
VL  - 10 
Y1  - 2010
PB  - Brasil 
ER  -