Wilhite, Carmen Irene. "Piano Sonata" by Elliott Carter: A Foreshadowing of His Later Style; a Lecture Recital, Together with Three Recitals of Selected Works, dissertation, May 1977; (https://digital.library.unt.edu/ark:/67531/metadc332172/m1/1/: accessed April 20, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; .