?url_ver=Z39.88-2004&rft_id=10.2118%2F120111-ms&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.aufirst=N.A.F.&rft.aulast=El-Khatib&rft.au=El-Khatib%2C+N.A.F.&rft.title=Transient+pressure+behavior+for+a+reservoir+with+continuous+permeability+distribution+in+the+invaded+zone&rft.date=2009&rft.isbn=9781615670123&rft.genre=proceeding