http://www.berkeleybreathed.com/opus-letter.html

http://www.hsus.org/forms/the_opus_contest.html

http://www.salon.com/books/feature/2007/06/03/breathed/

http://dir.salon.com/story/ent/feature/2003/11/20/breathed/

http://www.berkeleybreathed.com/pages/Cartoon_Collections.asp

http://images.salon.com/comics/opus/2008/11/02/opus/story.jpg

http://en.wikipedia.org/wiki/Berkeley_Breathed