Research into the costs of vehicle exhaust gases from the standpoint of using natural gas-powered buses
Ivan IvkoviÄ‡1*, Å½eljko Janjoš2, SreÄ‡ko Å½eÅ¾elj1 and Vojkan JovanoviÄ‡1
1Department of Road Transport, the Faculty of Transport and Traffic Engineering, University of Belgrade, Serbia.
2City net Ltd, Agency for Consulting and Management, Belgrade, Serbia.
Email: [email protected]