David Carrson Berry The Meaning(s) of "without". An Exploration of Liszt's Bagatelle ohne Tonart in: 19th Century Music, Bd. 27, 2004, S. 230–262
Allan Keiler Liszt and Beethoven. The Creation of a Personal Myth in: 19th Century Music, Bd. 12, 1988-1989, S. 116–131