1. Weathering and Failures—A Third Generation of Engineering Geology;Chigira,1995
2. Introduction to Geology for Natural Disasters;Chigira,1998
3. Cruden, D.M., Varnes, D.J., 1996. Landslide types and processes. In A.K. Turner and R.L. Schuster, eds., Landslide—Investigation and Mitigation, (U.S.) National Research Council, Transportation Research Board Special Report 247, pp. 36–75.
4. Formation of slip surface in landslides;Egawa;Journal of Japan Landslide Society,1984
5. Investigation of Anahara Landslide,1982