Geraldine Field Keeling Liszt's Extant Eck and Lefebvre Piano in: Liszt Saeculum, Bd. 56, 1996, S. 26–31
Andrew Bonner Liszt's "Les Préludes" and "Les Quatre Élémens". A Reinvestigation in: 19th Century Music, Bd. 10, 1986, S. 95–107
