?url_ver=Z39.88-2004&rft_id=10.1109%2FNatPC.2011.6136531&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aulast=Khanifar&rft.au=Khanifar%2C+A.&rft.aufirst=A.&rft.isbn=9781457718847&rft.date=2011&rft.title=Investigation+the+effects+of+asphaltene+presence+on+reservoir+performance&rft.genre=proceeding