?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.renene.2017.07.085&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Z.&rft.aulast=Ullah&rft.au=Ullah%2C+Z.&rft.title=Renewable+Energy&rft.date=2017&rft.volume=114&rft.issn=09601481&rft.pages=755-765&rft.atitle=Preparation+and+kinetics+study+of+biodiesel+production+from+waste+cooking+oil+using+new+functionalized+ionic+liquids+as+catalysts&rft.genre=article