Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) 山岸 明,An Effective Auxiliary Method for Extremely Thin Overburden Tunneling : π-Roof Slab Method in YAEHARA Tunnel,土と基礎 : 地盤工学会誌,00413798,東京 : 地盤工学会,1994-08,42,8,p41-44,https://cir.nii.ac.jp/crid/1520290885257914240,