@ARTICLE{
author={Ivkovic Ivan S,Janjos Zeljko,Danon Gradimir J,Zezelj Srecko},
year={2014},
title={Dynamic Friction in the Braking, Tire - Road Contact},
journal={PROCEEDINGS OF THE SECOND INTERNATIONAL CONFERENCE ON TRAFFIC AND TRANSPORT ENGINEERING (ICTTE)},
volume={},
number={},
pages={420-430},
document_type={Proceedings Paper},
} 

@ARTICLE{
author={Ivkovic Ivan S,Janjos Zeljko,Milovanovic Branko M,Zezelj Srecko},
year={2012},
title={Fuel Consuption Analisys of Cng and Hybrid Buses on the Road Nework},
journal={PROCEEDINGS OF INTERNATIONAL CONFERENCE ON TRAFFIC AND TRANSPORT ENGINEERING (ICTTE)},
volume={},
number={},
pages={227-242},
document_type={Proceedings Paper},
} 

@ARTICLE{
author={Ivkovic Ivan S,Janjos Zeljko,Zezelj Srecko,Jovanovic Vojkan D},
year={2011},
title={Research into the costs of vehicle exhaust gases from the standpoint of using natural gas-powered buses},
journal={AFRICAN JOURNAL OF BUSINESS MANAGEMENT},
volume={5},
number={22},
pages={9304-9321},
document_type={Article},
}