TY  - JOUR 
T1  - Pain in preterm infants: effects of sex, gestational age, and neonatal illness severity
JO  - Psychology & Neuroscience
A1  - Valeri, Beatriz Oliveira
A1  - Linhares, Maria Beatriz Martins
SN  - 1983-3288
UL  - 10.3922/j.psns.2012.1.03
VL  - 5 
Y1  - 2012
PB  - Brasil 
ER  -