?url_ver=Z39.88-2004&rft_id=10.18517%2Fijaseit.9.3.4478&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=S.&rft.au=Irawan%2C+S.&rft.aulast=Irawan&rft.issue=3&rft.volume=9&rft.issn=20885334&rft.pages=816-821&rft.atitle=Study+of+lateral+vibration+of+drilling+string+with+mass+imbalance+using+finite+element&rft.title=International+Journal+on+Advanced+Science%2C+Engineering+and+Information+Technology&rft.date=2019&rft.genre=article