?url_ver=Z39.88-2004&rft_id=10.1108%2FILT-09-2016-0203&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=A.M.H.S.&rft.aulast=Lubis&rft.au=Lubis%2C+A.M.H.S.&rft.date=2017&rft.title=Industrial+Lubrication+and+Tribology&rft.atitle=XPS+characterization+of+tribo-layer+formation+on+the+steel+lubricated+with+crude+and+epoxidized+jatropha+oil+under+boundary+lubrication&rft.pages=371-377&rft.issue=3&rft.volume=69&rft.issn=00368792&rft.genre=article