http://internet.watch.impress.co.jp/cda/news/2007/07/30/16489.html

http://www.forest.impress.co.jp/article/2007/07/30/softifreeocr.html

http://www.forest.impress.co.jp/article/2007/07/30/dokodemooo.html

http://internet.watch.impress.co.jp/cda/news/2007/07/30/16488.html

http://www.ringolab.com/note/daiya/archives/005055.html

http://www.drakahige.com/NEWS/DAILY/2007/2007073002.shtml

http://www.darkroastedblend.com/2007/07/worlds-most-interesting-bridges.html

http://www.mainichi-msn.co.jp/shakai/wadai/news/20070731k0000m040140000c.html

http://www.nikkei.co.jp/news/shakai/20070731AT1G3003030072007.html