?url_ver=Z39.88-2004&rft_id=10.3390%2Fcryst11080858&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Yan%2C+X.&rft.aulast=Yan&rft.aufirst=X.&rft.issue=8&rft.volume=11&rft.issn=20734352&rft.atitle=Experiments+and+mechanical+simulation+on+bubble+concrete%3A+Studies+on+the+effects+of+shape+and+position+of+hollow+bodies+mixed+in+concrete&rft.title=Crystals&rft.date=2021&rft.genre=article