http://warp.da.ndl.go.jp/info:ndljp/pid/7704001/ecowww.leh.kagoshima-u.ac.jp/staff/kuwabara/memory.htm
http://warp.da.ndl.go.jp/info:ndljp/pid/8658069/ecowww.leh.kagoshima-u.ac.jp/staff/kuwabara/
The Internet Archive
http://web-beta.archive.org/web/20130601102742/http://www.cc.kagoshima-u.ac.jp/about/information/ccc_kouhou_2003_no16.html
http://web-beta.archive.org/web/20130603054221/http://www.geocities.jp/issn03890104no57/DPno0701Reflected/doctor/
http://web-beta.archive.org/web/20130601085648/http://www.geocities.jp/issn03890104no57/DPno0701Reflected/
http://web-beta.archive.org/web/20141109092200/http://www.geocities.jp/ptk20120118/Lecture-research/
http://web-beta.archive.org/web/20130628092115/http://kuris.cc.kagoshima-u.ac.jp/704613.html
https://drive.google.com/folderview?id=0BzUgmWiYm4TEbXY0aW9fSHVadFE&usp=sharing&tid=0BzUgmWiYm4TEQk0tQ0lGNGh4YVk