1. Andresen L, Jostad HP (2004) Analyses of progressive failure in long natural slopes. In: Proceedings of the 9th Symposium on Numerical Models in Geomechanics (NUMOG IX), Ottawa, 25–27 August, 2004
2. Ariane L, Serge L, Stig B, Denis D, Hans PJ, Lyes O (2011) Progressive failures in eastern Canadian and Scandinavian sensitive clays. Can Geotechnique J 48:1696–1712
3. ASTM D4829 Standard test method for expansion index of soils. Annual Book of ASTM Standards, American Society for Testing and Materials, West Conshohocken
4. Bernander S, Olofsson I (1981) On formation of progressive failure in slopes. In: Proceeding of the 10th International Conference on Soil Mechanics and Foundation Engineering (ICSMFE), Stockholm, Sweden, 15–19 June, 1981
5. Bjerrum L (1967) Progressive failure in slopes in over-consolidated plastic clay and clay shales. Terzaghi lecture. J Soil Mech Found Div ASCE 93:3–49