Example 1: Frescobaldi, “Ricercare cromatico post il Credo” (subject) and Ligeti, “Musica Ricercata XI” (subject) (With permission by SCHOTT MUSIC, Mainz) Györgi Ligeti’s organ works and the spirit of innovation within tradition
Colin MacKnight Proportional relationships in Bach’s Die Kunst der Fuge and the intended duration of Contrapunctus XIV
Great Organ, Boston Music Hall Pioneers in American Music, 1860−1920, The New England Classicists: A book by Barbara Owen
