@ARTICLE{
author={Velickovic Dragan T,Nikolova Milena T,Ivancheva Stephanie V,Stojanovic Jelena B,Veljkovic Vlada B},
year={2007},
title={Extraction of flavonoids from garden (Salvia officinalis L.) and glutinous (Salvia glutinosa L.) sage by ultrasonic and classical maceration},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={72},
number={1},
pages={73-80},
document_type={Article},
} 

@ARTICLE{
author={Stojanovic Jelena B,Vladimirov Sote M,Marinkovic Valentina D,Velickovic Dragan T,Sibinovic Predrag S},
year={2007},
title={Monitoring of the photochemical stability of carvedilol and its degradation products by the RP-HPLC method},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={72},
number={1},
pages={37-44},
document_type={Article},
} 

@ARTICLE{
author={Stojanovic Jelena B,Marinkovic Valentina D,Vladimirov Sote M,Velickovic Dragan T,Sibinovic Predrag S},
year={2005},
title={Determination of carvedilol and its impurities in pharmaceuticals},
journal={CHROMATOGRAPHIA},
volume={62},
number={9-10},
pages={539-542},
document_type={Article},
}