Wen 1990, p. 107; the quote is Wen's translation from the work of Richard Heuberger, Erinnerungen an Johannes Brahms, Tutzing, 1971, p. 93. According to Heuberger, Brahms' original statement in German was: "ein Wunderwerk der Kunst und voll genialer Einfälle". Wen, Eric (1990). "Enharmonic transformation in the first movement of Mozart's Piano Concerto in C minor, K. 491". In Hedi Siegel (ed.). Schenker Studies: Symposium: Papers. New York: Cambridge University Press. ISBN0521360382.
Stock 1997, p. 212. Stock, Jonathan P. J. (May 1997). "Orchestration as Structural Determinant: Mozart's Deployment of Woodwind Timbre in the Slow Movement of the C minor Piano Concerto K. 491". Music & Letters. 78 (3): 210–219. doi:10.1093/ml/78.2.210.
Stock 1997, p. 213. Stock, Jonathan P. J. (May 1997). "Orchestration as Structural Determinant: Mozart's Deployment of Woodwind Timbre in the Slow Movement of the C minor Piano Concerto K. 491". Music & Letters. 78 (3): 210–219. doi:10.1093/ml/78.2.210.
King 1952, p. 99. King, A. Hyatt (1952). "Wolfgang Amadeus Mozart (1756–1791)". In Ralph Hill (ed.). The Concerto. Melbourne: Penguin Books. OCLC899058745.
King 1952, p. 95. King, A. Hyatt (1952). "Wolfgang Amadeus Mozart (1756–1791)". In Ralph Hill (ed.). The Concerto. Melbourne: Penguin Books. OCLC899058745.