1. Displacement of the depressed areas in the graben, estimated by the altitude of the inland sediments in central Kyushu, Japan;Hase;Mem. Geol. Soc. Jpn.,1993
2. Neogene tectonic history of northern Kyushu, Japan — the Hikosan and its western area;J. Geol. Soc. Jpn.,1992
3. Eruption age for the Yufugawa pyroclastic-flow deposit in central Kyushu Japan;Hoshizumi;Bull. Volcanol. Soc. Jpn.,1991
4. Geohistory of the Median Tectonic Line of Southwest Japan;Ichikawa;Mem. Geol. Soc. Jpn.,1980
5. Oil and Natural Gas Resources in Japan;Ishiwada,1992