@ARTICLE{
author={Savin Lazar D,Nikolic Ratko,Simikic Mirko D,Furman Timofej F,Tomic Milan D,Djuric Simonida S,Vasin Jovica R},
year={2008},
title={The analysis of soil compaction influence on wheat yield on headlands and inner part of fields},
journal={ACTUAL TASKS ON AGRICULTURAL ENGINEERING},
volume={36},
number={},
pages={145-153},
document_type={Proceedings Paper},
} 

@ARTICLE{
author={Nikolic Ratko,Savin Lazar D,Furman Timofej F,Tomic Milan D,Gligoric Radojka,Simikic Mirko D},
year={2007},
title={Research of the bases for development of agricultural tractors},
journal={ACTUAL TASKS ON AGRICULTURAL ENGINEERING},
volume={35},
number={},
pages={59-67},
document_type={Proceedings Paper},
}