http://groovy.codehaus.org/
http://www.kakutani.com/trans/ociweb/jnbFeb2004.html
http://www.wikiroom.com/Groovy/
http://www.atmarkit.co.jp/fjava/rensai3/devworks05/devworks05_1.html
http://slashdot.jp/developers/article.pl?sid=07/01/06/215241