@article{oai:repo.qst.go.jp:00044866,
 author = {Kawada, Yusuke and Nagahama, Hiroyuki and Omori, Yasutaka and Yasuoka, Yumi and Ishikawa, Tetsuo and Tokonami, Shinji and et.al and 安岡 由美 and 石川 徹夫 and 床次 眞司},
 journal = {Nonlinear Processes in Geophysics},
 month = {Apr},
 pages = {123--130},
 title = {Time-scale invariant changes in atmospheric radon concentration and crustal strain prior to a large earthquake},
 volume = {14},
 year = {2007}
}