?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.matlet.2020.129127&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A.R.&rft.aulast=Tobi&rft.au=Tobi%2C+A.R.&rft.title=Materials+Letters&rft.date=2021&rft.volume=285&rft.issn=0167577X&rft.atitle=Evaluation+of+low-cost+high+performance+solid-state+supercapacitor+derived+from+physically+and+chemically+activated+oil+palm+fiber&rft.genre=article