Vinacke, Edgar. 8 May 1946. "The Concept of Aviator's 'Vertigo'". Report No.#7. U.S. Naval School of Aviation Medicine, Project (X-148-Av-4-3). Reprinted in Journal of Aviation Medicine. 1948. 19:158–190
See for instance; Holman, "Smokey Stover – A Dead Ringer", Daily News, 21 November 1938, retrieved 6 Feb 2009, Holman, "Smokey Stover – Movie Idle", Daily News, 23 November 1938, retrieved 6 Feb 2009.