?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Iqbal&rft.au=Iqbal%2C+O.&rft.aufirst=O.&rft.date=2019&rft.issn=18196608&rft.title=ARPN+Journal+of+Engineering+and+Applied+Sciences&rft.issue=18&rft.atitle=New+model+of+brittleness+index+to+locate+the+sweet+spots+for+hydraulic+fracturing+in+unconventional+reservoirs&rft.pages=3271-3283&rft.volume=14&rft.genre=article