1. Editional department of execution technique: Total of recently torrential rain. Execution Technique 5 (1972) (in Japanese)
2. Takei, A., Kobashi, S., Nakayama, M., et al.: Landslide, slope failure and debris flow. In: Prediction and Countermeasures, Association of Kajima Pub., (1993) (in Japanese)
3. Ishikawa, Y., Furuzeki, J., Sasaki, Y., et al.: Soil attack — Soil disaster, Geotech note, J. of Japanese Geotechnical Society, (1995) (in Japanese)
4. Suzuki, M. et al.: Dangerous rainfall which soil disaster may be happened. J. of New Erosion Control 110, (1995) (in Japanese) 1–7
5. Kobashi, S.: Problems in classifying the danger levels of slope failure. J. of Landslide 10/3 (1995) (in Japanese) 8–14