Keisuke Nakata Kumiko Maeda Takaaki Umedu Akihito Hiromori Hirozumi Yamaguchi Teruo Higashino Modeling and Evaluation of Rescue Operations Using Mobile Communication Devices. 64-71 2009 PADS http://doi.acm.org/10.1145/1577959.1577975 conf/pads/2009 db/conf/pads/pads2009.html#NakataMUHYH09