1. Japan Ministry of Economy, Trade and Industry, 2004, About the investigation results of large-size automatic revolving doors (METI news release, Nov. 11, '04)
2. Japan Ministry of Economy, Trade and Industry, 2004, Corrections of “About the investigation results of large-size automatic revolving doors” (METI news release, Dec. 24, '04)
3. Hatamura Institute for the Advancement of Technology, 2004, Door Project Symposium - Proposal about the danger hidden in doors and their safety
4. Strength of Biological Materials;Yamada,1970
5. Mori Building Co., Ltd, 2004, Report: our programs towards safety -about the removal and modification of the revolving door (www.mori.co.jp, Nov. 4, '04)