@misc{oai:repo.qst.go.jp:00069827,
 author = {Tokonami, Shinji and Yoshinaga, Shinji and Kovacs, T. and Kavasi, N. and Sugino, Masato and Kobayashi, Yosuke and Takahashi, Hiroyuki and 床次 眞司 and 吉永 信治 and 杉野 雅人 and 小林 羊佐},
 month = {Oct},
 note = {8th international symposium on the natural radiation environment},
 title = {Influence of environmental thoron on radon estimates.},
 year = {2007}
}