1. Adhikari, D.P., Kumon, F. and Kawajiri, K. (2002): Holocene climate variability as deduced from the organic carbon and diatom records in the sediments of Lake Aoki, central Japan. Journal of the Geological Society of Japan, 108, 249-265.
2. Anma, K., Nagaoka, M., Niwa, S., Sekimoto, K., Yoshikawa, M. and Fujine, H. (1990): A geological survey for the study on neotectonic movement and geoenvironment of Lake Suwa, Nagano Prefecture. Memoirs of the Geological Society of Japan, 36, 179-194.
3. Bradley, R.S. (1999): Paleoclimatology—Reconstructing Climates of the Quaternary. Academic Press, San Diego.
4. Geological Survey of Japan (1988): Report on Lake Drilling of Bottom Sediments from Lake Aoki (Aokiko No Kotei Taisekibutsu Saishu Sagyo Hokokusho).*
5. Dansgaard. W., Johnsen, S.J., Moller, J. and Langway, C.C. (1969): One thousand centuries of climate record from Camp Century on the Greenland ice sheet. Science, 166, 377-381.