1. ASTM D-6467 (2006) Standard Test Method for Torsional Ring Shear Test to Determine Drained Residual Shear Strength of Cohesive soils (ASTM D 6467-06a). ASTM, West Conshohocken
2. Bhat DR, Bhandary NP, Yatabe R (2013) Effect of shearing rate on residual strength of kaolin clay. Electron J Geotech Eng 18(G):1387–1396
3. Bishop AW, Green GE, Garga VK, Anderson A, Brown JD (1971) A new ring shear apparatus and its application to the measurement of residual strength. Geotechnique 21(4):273–328. doi: 10.1680/geot.1971.21.4.273
4. Egashira K, Matsuo K, Gibo S, Nakamura S, Zhou Y, Inoue H, Sasaki K (2000) Clay mineralogical approach to the slip surface formation in the O’dokoro landlside, Niigata, Central Japan. Clay Sci 11:107–113
5. Gibo S (1994) Ring shear apparatus for measuring residual strength and measurement accuracy. J of the Jpn Landslide Soc 31(3):24–30 (in Japanese with English abstract)