:''The numerical model is constructed based on the information from the FEMA report.'' <ref>http://www.kz.tsukuba.ac.jp/~isobe/wtc-e.html</ref> | :''The numerical model is constructed based on the information from the FEMA report.'' <ref>http://www.kz.tsukuba.ac.jp/~isobe/wtc-e.html</ref> |