?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.jksus.2017.05.014&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=H.&rft.au=Ullah%2C+H.&rft.aulast=Ullah&rft.atitle=Comparative+assessment+of+various+extraction+approaches+for+the+isolation+of+essential+oil+from+polygonum+minus+using+ionic+liquids&rft.pages=230-239&rft.volume=31&rft.issn=10183647&rft.issue=2&rft.date=2019&rft.title=Journal+of+King+Saud+University+-+Science&rft.genre=article