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3. ICRP Publication 60 (1991) 1990 Recommendations of the International Commission on Radiological Protection. Annals of the ICRP 21 (1–3).
4. Star Map, Tokai, Ibaragi, Zenrin, KitaKyushuu, (1999).
5. Takada, J., Suga, S., Kitagawa, K., Ishikawa, M., & Hoshi, M. (1999). Neutron beam from uranium fuel factory to residential area in Tokai September 30 1999. Applied Physics Letters, November 30, 1999, Submitted for publication.