Tony K. Mak Kenneth P. Laberteaux Raja Sengupta A multi-channel VANET providing concurrent safety and commercial services. 1-9 2005 conf/mobicom/2005vanet Vehicular Ad Hoc Networks http://doi.acm.org/10.1145/1080754.1080756 db/conf/mobicom/vanet2005.html#MakLS05