Massey, B. S. (Bernard Stanford) (1998). "10.8.2". Mechanics of fluids. Vol. 2. Ward-Smith, A. J. (Alfred John) (7th ed.). Cheltenham, England: S. Thornes. ISBN0-7487-4043-0. OCLC40928151.
Anderson, John D. Jr. (1999). "2.2". Aircraft performance and design. Boston: WCB/McGraw-Hill. ISBN0-07-001971-1. OCLC40076736.