1. Conference on Subsidence in the Nanao Port Area, 1975. Report of the Investigation on Land Subsidence in the Nanao Port Area in Ishikawa Prefecture, pp. 33–43, in Japanese.
2. Kanto Bureau of International Trade and Industry, 1994. Report for Rationalization of Ground Water Use in Ojiya Area in Niigata Prefecture (edition for hydrological analysis), 60 pp., in Japanese.
3. Application of GPS with sub-centimeter accuracy for subsidence monitoring;Krijnen,1995
4. Expansion of GSI's Nationwide GPS Array;Miyazaki;Bulletin of Geographical Survey Institute,1997
5. The Nationwide GPS Array as an earth observation system;Miyazaki;Bulletin of Geographical Survey Institute,1998