TY  - JOUR 
T1  - Abdominal muscle electrical activity during labor expulsive stage: a cross-sectional study
JO  - Brazilian Journal of Physical Therapy
A1  - Oliveira, Belisa D. R.
A1  - Andrade, Armèle Dornelas de
A1  - Lemos, Andréa
A1  - Brito, Vitor C.
A1  - Pedrosa, Manuela L.
A1  - Silva, Thayse N. S.
SN  - 1413-3555
UL  - 10.1590/S1413-35552011005000029
VL  - 15 
Y1  - 2011
PB  - Brasil 
ER  -