http://www.wikipedia.com/wiki/Anton+Diabelli Encyclopedia article from Wikipedia. http://www.karadar.net/Dictionary/diabelli.html Karadar dictionary entry with life, portrait, and links to related composers. http://stevenestrella.com/composers/composerfiles/diabelli1858.html Biographical data, recommended CDs, books and sheet music, bibliography, and links to biographical essays. http://www.geocities.com/Vienna/4098/33.html Historical account with technical details of Beethoven's involvement in the project with RA format audio examples of specific passages. Abridged note from a William Kinderman book. http://www.georgehart.com/diabelli/ Background notes on the piece in a performance guide from Northport, New York.