@ARTICLE{
author={Sidjanin Leposava P,Ranogajec Jonjaua G,Rajnovic Dragan M,Molnar Elvira},
year={2007},
title={Influence of firing temperature on mechanical properties on roofing tiles},
journal={MATERIALS & DESIGN},
volume={28},
number={3},
pages={941-947},
document_type={Article},
} 

@ARTICLE{
author={Sidjanin Leposava P,Rajnovic Dragan M,Ranogajec Jonjaua G,Molnar Elvira},
year={2007},
title={Measurement of Vickers hardness on ceramic floor tiles},
journal={JOURNAL OF THE EUROPEAN CERAMIC SOCIETY},
volume={27},
number={2-3},
pages={1767-1773},
document_type={Article},
}