Iwasaki, I., Ozawa, T. and Yoshida, M. (1966) Differentiation of volcanic emanation around the boiling point of water in geothermal regions in Japan, Bull. Volcanologique, 26, 517-528.
北海道立地下資原調査所(1980) (D) 北海道東部, II. 3 川湯・アトサヌプリ地区,北海道の地熱・温泉,72-87.
Oki, Y. and Hirano, T. (1970) Geothermal system of Hakone volcano, Geothermics, Special Issue 2, 1157-1166.