Nagamachi, S., Toya, T. & Yoshitake, Y. Influence of environmental change near the atmospheric electric field observation hut at Kakioka - numerical calculations to estimate the effect of a nearby bamboo grove-
Yamazaki, A. & Mishima, T. Frequency characteristics of high-sensitivity fluxgate magnetometers at Kakioka, Kanoya, and Memambetsu Magnetic Observatories