@ARTICLE{
author={Miljevic Nada R,Boreli-Zdravkovic Djulija,Velickovic Jovana J,Golobocanin Dusan D,Mayer Bernhard},
year={2013},
title={Evaluation of the origin of sulphate at the groundwater source Kljuc, Serbia},
journal={ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES},
volume={49},
number={1},
pages={62-72},
document_type={Article},
} 

@ARTICLE{
author={Miljevic Nada R,Boreli-Zdravkovic Djulija,Obradovic Vesna,Golobocanin Dusan D,Mayer Bernhard},
year={2012},
title={Evaluation of the origin of nitrate influencing the Kljuc groundwater source, Serbia},
journal={WATER SCIENCE AND TECHNOLOGY},
volume={66},
number={3},
pages={472-478},
document_type={Article},
}