?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.asej.2020.08.004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=I.&rft.aulast=Othman&rft.au=Othman%2C+I.&rft.issue=1&rft.volume=12&rft.issn=20904479&rft.pages=21-30&rft.atitle=Barriers+of+value+management+implementation+for+building+projects+in+Egyptian+construction+industry&rft.title=Ain+Shams+Engineering+Journal&rft.date=2021&rft.genre=article