@ARTICLE{
author={Manovic Vasilije,Grubor Borislav D,Ilic Mladen,Jovancicevic Branimir S},
year={2003},
title={Sulfur retention by ash during coal combustion. Part II. A model of the process},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={68},
number={3},
pages={171-182},
document_type={Article},
} 

@ARTICLE{
author={Ilic Mladen,Grubor Borislav D,Manovic Vasilije},
year={2003},
title={Sulfur retention by ash during coal combustion. Part I. A model of char particle combustion},
journal={JOURNAL OF THE SERBIAN CHEMICAL SOCIETY},
volume={68},
number={2},
pages={137-145},
document_type={Article},
}