?url_ver=Z39.88-2004&rft_id=10.1109%2FICIAS.2012.6306183&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=N.&rft.au=Armi%2C+N.&rft.aulast=Armi&rft.date=2012&rft.title=Decentralized+cooperative+user+in+opportunistic+spectrum+access+system&rft.isbn=9781457719677&rft.genre=proceeding