1. Endo, K., Iso, N., Miyahara, T., Tohno, I., Ohno, M., 1993. Volcanic ash falls in Unzendake eruption. In: Volcanic Disaster of Unzen-Dake—Problems of Soil Mechanism and Foundation Engineering. Jpn. Soc. Soil. Mech. Found. Eng., pp. 45–58, in Japanese.
2. Intrusive and extrusive growth of the Mount St. Helens lava dome;Fink;Nature,1990
3. The 15-September 1991 pyroclastic flows at Unzen (Japan); a flow model for associated ash-cloud surges;Fujii;J. Volcanol. Geotherm. Res.,1999
4. Geological report on the 1991 eruption at Unzen Volcano (Part 1);Bull. Volcanol. Soc. Jpn.,1992
5. Geophysical observation of the 1990–1992 eruption at Unzen Volcano (Part 1);Bull. Volcanol. Soc. Jpn.,1992