1. ASTM. (1996). “Standard test method for direct shear test of soils under consolidated drained conditions.” Annual book of ASTM standards ASTM D 3080 Vol. 04.08 ASTM West Conshohocken Pa. 295–300.
2. ASTM. (1997). “Standard test method for grab breaking load and elongation of geotextiles.” Annual book of ASTM standards ASTM D 4632 Vol. 04.09 ASTM West Conshohocken Pa. 972–975.
3. Byrne R. J. (1994). “Design issues with strain-softening interfaces in landfill liners.” Proc. Waste Tech. '94 Charleston S.C. 1–26.
4. Colloid Environmental Technologies Co. (CETCO). (1995). Bentomat/Claymax technical manual . CETCO Arlington Heights Ill.
5. Daniel D. E. Shan H.Y. and Anderson J. D. (1993). “Effects of partial wetting on the performance of the bentonite component of a geosynthetic clay liner.” Proc. Geosynthetics '93 Vol. 3 Industrial Fabrics Assoc. Int. Roseville Minn. 1483–1496.