The History of the Erard Piano and Harp in Letters and Documents. 1785–1959. Band 1: Inventions, Business, Composers and Performers. Band 2: Erard Family Correspondence: Hrsg. von Robert Adelson, Alain Roudier, Jenny Nex, Laure Barthel und Michel Foussard - Schröder, Julia H. (Die Musikforschung, 2017)