?url_ver=Z39.88-2004&rft_id=10.2174%2F1874149501711010638&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=B.S.&rft.aulast=Mohammed&rft.au=Mohammed%2C+B.S.&rft.volume=11&rft.issn=18741495&rft.pages=638-649&rft.atitle=Evaluation+of+nano-silica+modified+ECC+based+on+ultrasonic+pulse+velocity+and+rebound+hammer&rft.title=Open+Civil+Engineering+Journal&rft.date=2017&rft.genre=article