?url_ver=Z39.88-2004&rft_id=10.1007%2Fs13762-018-1735-6&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ullah%2C+Z.&rft.aulast=Ullah&rft.aufirst=Z.&rft.atitle=Phosphonium-based+hydrophobic+ionic+liquids+with+fluorous+anions+for+biodiesel+production+from+waste+cooking+oil&rft.pages=1269-1276&rft.issue=3&rft.volume=16&rft.issn=17351472&rft.date=2019&rft.title=International+Journal+of+Environmental+Science+and+Technology&rft.genre=article