TY  - JOUR 
T1  - Local analgesic effect of tramadol is not mediated by opioid receptors in
               early postoperative pain in rats
JO  - Revista Brasileira de Anestesiologia
A1  - Sousa, Angela Maria
A1  - Ashmawi, Hazem Adel
SN  - 0034-7094
UL  - 10.1016/j.bjane.2014.06.006
VL  - 65 
Y1  - 2015
PB  - Brasil 
ER  -