TY  - JOUR 
T1  - HPLC/DAD determination of rosmarinic acid in Salvia officinalis: sample preparation optimization by factorial design
JO  - Journal of the Brazilian Chemical Society
A1  - Oliveira, Karina B. de
A1  - Oliveira, Brás H. de
SN  - 0103-5053
UL  - 10.1590/S0103-50532013000100012
VL  - 24 
Y1  - 2013
PB  - Brazil 
ER  -