?url_ver=Z39.88-2004&rft_id=10.4028%2Fwww.scientific.net%2FKEM.796.145&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=T.A.&rft.au=Lemma%2C+T.A.&rft.aulast=Lemma&rft.pages=145-154&rft.atitle=Remaining+useful+life+prediction+of+drill+string+using+fuzzy+systems+and+cumulative+damage+theory&rft.volume=796&rft.issn=10139826&rft.date=2019&rft.title=Key+Engineering+Materials&rft.genre=article