著者名,タイトル,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Vaughan,Engineering behaviour of weak rock: Some answers and some questions,Geotechnical Engineering of hard soils and soft rocks,,,1997,3,,1741,https://cir.nii.ac.jp/crid/1370569869735707017,