@article{oai:ritsumei.repo.nii.ac.jp:00008973,
 author = {TINH, Pham Doan and KAWAI, Makoto},
 journal = {歴史都市防災論文集, 歴史都市防災論文集},
 month = {Jun},
 pages = {91--98},
 title = {Improved GPS-free ad-hoc network positioning for urban disaster response},
 volume = {3},
 year = {2009}
}