@ARTICLE{
author={Djatkov Djordje M,Effenberger Mathias,Lehner Andreas,Martinov Milan L,Tesic Milos,Gronauer Andreas},
year={2012},
title={New method for assessing the performance of agricultural biogas plants},
journal={RENEWABLE ENERGY},
volume={40},
number={1},
pages={104-112},
document_type={Article},
} 

@ARTICLE{
author={Tesic Milos,Kiss Ferenc E,Zavargo Zoltan Z},
year={2011},
title={Renewable energy policy in the Republic of Serbia},
journal={RENEWABLE & SUSTAINABLE ENERGY REVIEWS},
volume={15},
number={1},
pages={752-758},
document_type={Review},
}