Leavell and Craig, Between Rock and a Home Place, pp. 260–264. For the ending year, see Tunis, Walter (April 21, 1991). "David Goldflies' jazz vision". Lexington Herald-Leader. pp. C1, C7 – via Newspapers.com.
9721479, Citron, Howard & Leavell, Chuck, "United States Patent: 9721479 – Apparatus, system and method for teaching music and other art forms", issued August 1, 2017[permanent dead link]