?url_ver=Z39.88-2004&rft_id=10.3934%2Fmath.2020244&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=N.A.&rft.au=Harim%2C+N.A.&rft.aulast=Harim&rft.atitle=Positivity+preserving+interpolation+by+using+rational+quartic+spline&rft.issue=4&rft.pages=3762-3782&rft.title=AIMS+Mathematics&rft.date=2020&rft.volume=5&rft.issn=24736988&rft.genre=article