Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) KIYA Hideo,Classification of Soil Ground depending on the Evaluation of Tunnel Face Stability.,Journal of the Japan Society of Engineering Geology,02867737,Japan Society of Engineering Geology,2000,41,1,2-11,https://cir.nii.ac.jp/crid/1390282679071506048,https://doi.org/10.5110/jjseg.41.2