@ARTICLE{
author={Batas Bjelic Ilija R,Rajakovic Nikola Lj,Cosic Boris,Duic Neven Z},
year={2015},
title={A Realistic EU Vision of a Lignite-Based Energy System in Transition: Case Study of Serbia},
journal={THERMAL SCIENCE},
volume={19},
number={2},
pages={371-382},
document_type={Article},
} 

@ARTICLE{
author={Batas Bjelic Ilija R,Rajakovic Nikola Lj,Cosic Boris,Duic Neven Z},
year={2013},
title={Increasing wind power penetration into the existing Serbian energy system},
journal={ENERGY},
volume={57},
number={},
pages={30-37},
document_type={Article},
}