?url_ver=Z39.88-2004&rft_id=10.1002%2Fente.202100303&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=C.C.&rft.aulast=Chong&rft.au=Chong%2C+C.C.&rft.atitle=State-of-the-Art+of+the+Synthesis+and+Applications+of+Sulfonated+Carbon-Based+Catalysts+for+Biodiesel+Production%3A+a+Review&rft.issue=9&rft.volume=9&rft.issn=21944288&rft.date=2021&rft.title=Energy+Technology&rft.genre=article