?url_ver=Z39.88-2004&rft_id=10.1109%2FSIECPC.2011.5876940&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=I.A.&rft.au=Sumra%2C+I.A.&rft.aulast=Sumra&rft.date=2011&rft.title=New+card+based+scheme+to+ensure+security+and+trust+in+vehicular+communications&rft.isbn=9781457700699&rft.genre=proceeding