?url_ver=Z39.88-2004&rft_id=10.1016%2Fj.matpr.2022.06.572&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.au=Zulkarnain%2C+N.N.&rft.aulast=Zulkarnain&rft.aufirst=N.N.&rft.issn=22147853&rft.title=Lignosulfonate+as+a+retarder+in+geopolymer+cement+for+oil+well+cementing%3A+Effect+on+compressive+strength&rft.date=2022&rft.genre=proceeding