1. Howe, J. T. and Sheaffer, Y. S. "Mass Addition in the Stagnation Region For Velocities Up to 50,000 Feet Per Second," TR R-207, Aug.1964, NASA.
2. Convective and radiative heat transfer during superorbital entry
3. Hayes, W. D. and Probstein, R. F., Hypersonic Flow Theory, Academic, New York, 1959, pp.388-389.