Krauter E,Geological and geotechnical features, investigation and classification of hard soils,Geotechnical Engineering of Hard Soils/Soft Rocks,1993(03).
[2]
张永双;曲永新,硬土-软岩(岩土间新类型)的确认及其判别分类研究,工程地质学报,2000.
[3]
梁金火;曲永新,中国东部膨胀岩数据库管理系统的研制,岩石力学与工程学报,1992(04).
[4]
Marinos P G,Hard soils-soft rocks: Geological features with special emphasis to soft rocks,Geotechnical Engineering of Hard Soils/Soft Rocks,1993(03).