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author={Ignjatovic Natasa R|,Ilic Maja D|,Rajakovic Ljubinka V|},
year={2015},
title={Analytical Techniques for Determination and Control of Silica Content in the Water in Thermal Power Plants},
journal={HEMIJSKA INDUSTRIJA},
volume={69},
number={6},
pages={605-616},
document_type={Article},
} 

@ARTICLE{
author={Mihajlovic Randjel P|,Ignjatovic Natasa R|,Todorovic Marija R|,Holclajtner-Antunovic Ivanka D|,Kaljevic Vesna M|},
year={2003},
title={Spectrophotometric determination of phosphorus in coal and coal ash using bismuth-phosphomolybdate complex},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={68},
number={1},
pages={65-73},
document_type={Article},
}