1. Akiyama , Tetsuo , ed. 1993.Koreisha no sumai to kotsu (Housing and transport for the elderly), Nippon-Hyoron-sha:9–15.
2. Akiyama , Tetsuo. 2001.Kotsu barrier-free ho: koreishakai no toshikiban-seibi to kotsu system (Transportation Accessibility Improvement Law, Upgrading the urban infrastructure and transportation system), The Infrastructure Planning Committee, Japan Society of Civil Engineers:15–24.
3. Akiyama , T. and Mihoshi , A. 1996.Ido to kotsu (Mobility and transport), Series on techniques in the aging society, Vol.Vol. 6, 12–14. Nippon-Hyoron-sha