Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Yoshikane T. and Suzuki K.,Unbonded Capping System,Concrete Journal,03871061,Japan Concrete Institute,2000,38,2,10-17,https://cir.nii.ac.jp/crid/1390282680432515072,https://doi.org/10.3151/coj1975.38.2_10