?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.eti.2020.101199&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=N.&rft.aulast=Yasvanthrajan&rft.au=Yasvanthrajan%2C+N.&rft.atitle=Production+of+biodiesel+from+waste+bio-oil+through+ultrasound+assisted+transesterification+using+immobilized+lipase&rft.volume=21&rft.issn=23521864&rft.date=2021&rft.title=Environmental+Technology+and+Innovation&rft.genre=article