?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.jksus.2020.101268&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=N.&rft.au=Ahmed%2C+N.&rft.aulast=Ahmed&rft.issue=1&rft.volume=33&rft.date=2021&rft.title=Journal+of+King+Saud+University+-+Science&rft.issn=10183647&rft.atitle=Evaluation+of+hydrocarbon+source+rock+potential%3A+Deep+marine+shales+of+Belaga+Formation+of+Late+Cretaceous-Late+Eocene%2C+Sarawak%2C+Malaysia&rft.genre=article