1. A Mysterious Crater Lake, Okama of Zao;Anzai,1961
2. Ban, M., Sagawa, H., Miura, K., Hirotani, S., (in press). Evidence for short-lived stratified magma chamber: petrology of Z-To5 tephra layer (c. 5.8 ka) at Zao volcano, NE Japan. In: Annen, C., Zellmer, G. (Eds.), Dynamics of Crustal Magma Transfer, Storage and differentiation. Geol. Soc. London, Special Publications.
3. Origin and stratigraphy of phreatomagmatic deposits at the Plesitocene Sinker Butte Volcano, Western Snake River Plain, Idaho;Brand;J. Volcanol. Geotherm. Res.,2007
4. Mount St. Helens — from the 1980 eruption to 2000;Brantley,2000
5. Characteristics of hydrothermal eruptions, with examples from New Zealand and elsewhere;Browne;Earth Sci. Rev.,2001