1996:http://hdl.handle.net/10232/7917
2003:http://hdl.handle.net/10232/4198
[http://warp.da.ndl.go.jp/info:ndljp/pid/1195815/ecowww.leh.kagoshima-u.ac.jp/staff/kuwabara/20100918/phd29.jpg]
[http://web.archive.org/web/20110607001752/http://www.cc.kagoshima-u.ac.jp/about/information/ccc_kouhou_2003_no16.html]
[http://gyo.tc/G1ws]