参考资料

http://www.xbjkw.com/Article_Show.asp?ArticleID=14547

http://www.1000xing.com/xxnews_html/20088/2008823143656.html

http://blog.sina.com.cn/s/blog_5337cdfe0100a8yr.html

http://www.fx120.net/JBZT/JB-WGXT/YK-/QITA%20=8/200502231332239306.htm