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year={2017},
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journal={GOSPODARKA SUROWCAMI MINERALNYMI-MINERAL RESOURCES MANAGEMENT},
volume={33},
number={4},
pages={93-106},
document_type={Article},
} 

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year={2011},
title={The Deterministic Fuzzy Linear Approach in Planning the Production of Mine System with Several Open Pits},
journal={ARCHIVES OF MINING SCIENCES},
volume={56},
number={3},
pages={489-497},
document_type={Article},
} 

@ARTICLE{
author={Sekulic Zivko T,Canic Neda,Bartulovic Zoran B,Dakovic Aleksandra S},
year={2004},
title={Application of different collectors in the flotation concentration of feldspar, mica and quartz sand},
journal={MINERALS ENGINEERING},
volume={17},
number={1},
pages={77-80},
document_type={Article},
}