Frantz, Donald Howe, Jr. “Search for Significant Form, 1905-1915: An Evaluation of the Symbols of Tradition and Revolt in American Literature, Painting, and Music.” Ph.D. diss., University of Southern California, 1960.
Schubert, Giselher. Review of Charles Ives: The Ideas Behind the Music, by J. Peter Burkholder; and Charles Ives: Ausgewählte Texte, edited by Werner Bartschi. Neue Zeitschrift für Musik (January 1987): 63.