TY  - JOUR 
T1  - Development and validation of alternative methods by non-aqueous acid-base titration and derivative ultraviolet spectrophotometry for quantification of sildenafil in raw material and tablets
JO  - Brazilian Journal of Pharmaceutical Sciences
A1  - Silva, Taízia Dutra
A1  - Toledo, Cibele Rodrigues
A1  - Vianna-Soares, Cristina Duarte
SN  - 1984-8250
UL  - 10.1590/s2175-97902017000115181
VL  - 53 
Y1  - 2017
PB  - Brasil 
ER  -