Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Niitani Kyoji and Watase Hiroshi and Sakata Kenji and Ayano Toshiki,Study on Effective Stress Estimation Method for Concrete Members,Concrete Research and Technology,13404733,Japan Concrete Institute,2009,20,2,27-37,https://cir.nii.ac.jp/crid/1390282679384495232,https://doi.org/10.3151/crt.20.2_27