HASHIMOTO, H. Anomalous geo-electric signals associated with recent seismic activities in Tsukuba and volcanic activity at Mt. Usu in Hokkaido. Seismo Electromagnetics : Lithosphere-Atmosphere-Ionosphere Coupling. 2002, 77-80
MURAKAMI, Y. Considerations on the anomalous observation of the pulse geo-electric current during February 2000 and March 2001 supposedly associated with the eruption of Usu volcano. Abstracts Weel A, IUGG 2003. 2003
TSUTSUMI, A. Relationships between geo-electric charge signals and meteorological lightning. Atmospheric and Ionosheric Electromagentic Phenomena Associated with Earthquakes. 1999, 577-590
ENOMOTO, Y. Notes on generation and propagation of seismic transient electric signals. A Critical Reviews of VAN. 1996, 324-331