@ARTICLE{
author={Zivkovic D,Pozhidaeva V,Veljic Milan,Veljovic Alempije},
year={2011},
title={Information System and System of Quality Procedures for Machine Lubrication},
journal={JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION},
volume={17},
number={4},
pages={640-652},
document_type={Article},
} 

@ARTICLE{
author={Zivkovic D,Pozhidaeva V,Sajfert Zvonko D},
year={2010},
title={Lubrication of Hay Presses as Part of Preventive Maintenance},
journal={JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION},
volume={16},
number={3},
pages={453-459},
document_type={Article},
} 

@ARTICLE{
author={Zivkovic D,Pozhidaeva V,Molnar Robert},
year={2009},
title={DOCUMENTATION ACCOMPANYING THE LUBRICATION OF AGRICULTURAL MACHINES AND REQUIREMENTS RELATING TO QUALITY SYSTEM STANDARDS},
journal={JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION},
volume={15},
number={2},
pages={270-279},
document_type={Article},
}