TY  - JOUR 
T1  - Effect of sildenafil (Viagra®) on the genital reflexes of paradoxical sleep-deprived male rats
JO  - Brazilian Journal of Medical and Biological Research
A1  - Andersen, M.L.
A1  - Bignotto, M.
A1  - Tufik, S.
SN  - 0100-879X
UL  - 10.1590/S0100-879X2006005000180
VL  - 40 
Y1  - 2007
PB  - Brasil 
ER  -