[1] ( ([TIME[2008-03-21 12:26:13 +09:00]] 版))
<http://www.himoji.jp/jp/publication/pdf/symposium/No05/D003-010.pdf>

[2] ( ([TIME[2006-12-23 02:36:39 +09:00]] 版))
<http://env.sc.niigata-u.ac.jp/~uda/udat/heiannkyo.pdf>

[3] ( ([TIME[2007-08-30 04:19:04 +09:00]] 版))
<http://library.jsce.or.jp/jsce/open/00028/1993/37-0809.pdf>