?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.molliq.2018.06.024&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Z.&rft.au=Ullah%2C+Z.&rft.aulast=Ullah&rft.issn=01677322&rft.atitle=A+review+on+ionic+liquids+as+perspective+catalysts+in+transesterification+of+different+feedstock+oil+into+biodiesel&rft.title=Journal+of+Molecular+Liquids&rft.date=2018&rft.pages=673-686&rft.volume=266&rft.genre=article