H. Mawatari

Crustal movements around the Beppu Bay area, East-Central Kyushu, Japan, observed by GPS 1996–1998

Y. Yusa, Y. Yusa, Y. Fukuda, 2000 .

Mixing of magmatic CO2 into volcano groundwater flow at Aso volcano assessed combining carbon and water stable isotopes

K. Kazahaya, S. Yoshikawa, S. Ohsawa, 2011 .

Color change of lake water at the active crater lake of Aso volcano, Yudamari, Japan: is it in response to change in water quality induced by volcanic activity?

Tsuneomi Kagiyama, Takeshi Saito, Shin Yoshikawa, 2010, Limnology.