http://javascript.crockford.com/memory/leak.html
http://geekswithblogs.net/FrostRed/archive/2008/11/29/127440.aspx
http://www.ibm.com/developerworks/web/library/wa-memleak/
http://msdn.microsoft.com/en-us/library/Bb250448
http://buildnewgames.com/garbage-collector-friendly-code/