Chernov, Eric B. “Where the truer beauties lie: analytical issues in four unbarred songs by Charles Ives.” Ph.D. Dissertation, State University of New York at Buffalo, 2009.
Sundell, Steven Lynn. “Charles Ives' use of simultaneity to conflict and blur tonality: the projection of multiple layers of music in "Putnam's camp" and related sources.” M.M. Thesis, University of Wisconsin-Madison, 1973.
Cornett-Murtada, Vanessa. “Quotation, revolution, and American culture: the use of folk tunes and the influence of Charles Ives in Frederic Rzewski's North American ballads for solo piano.” D.M.A. Thesis, University of North Carolina at Greensboro, 2004.
Burkholder, J. Peter. “The evolution of Charles Ives’s music: aesthetics, quotation, technique (Vol. 1).” Ph.D Dissertation, University of Chicago, 1983.
Bowden, Derek T. “Musical journeys across the American landscape: American sense of place and landscape revealed through national anthems and selected works of Aaron Copland and Charles Ives.” M.A. Thesis, University of Delaware, 2004.
Macdonald, Calum. Charles Ives: the unanswered question, Barbican Centre Friday 19 - Sunday 21 January, 1996. London, United Kingdom: BBC Radio 3, 1995.