http://www.classical.net/music/comp.lst/boito.html Basic Repertoire article with photograph, links, and list of operas. http://www.karadar.it/Dictionary/boito.html Musica Classica Classical Music Dictionary entry with life, operas and other works, and illustrations. Includes librettos for the operas of others. http://opera.stanford.edu/Boito/main.html Listing of birth and death dates. Links to operas, libretti, and portraits.