?url_ver=Z39.88-2004&rft_id=10.1109%2FITST.2011.6060147&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=I.A.&rft.aulast=Sumra&rft.au=Sumra%2C+I.A.&rft.isbn=9781612846712&rft.date=2011&rft.title=Trust+levels+in+peer-to-peer+(P2P)+vehicular+network&rft.genre=proceeding