Ishikawa T., Yasumura S., Ozasa K., Miyazaki M., Hosoya M., Akahane K., Yonai S., Ohtsuru A., Sakai A., Sakata R., Kurihara O., Kobashi G., Ohira T., Kamiya K., External dose estimation in an early stage after the Fukushima Daiichi Nuclear Power Plant accident -Lessons learned from behavior surveys using self-administered questionnaires. Japanese Journal of Health Physics 53(2), 100-110 (2018).