1. Stadler, J.R. and Inouye, M. "A Method of Reducing Heat Transfer to Blunt Bodies by Air Injection," NACA RMA56B27a,May,1956.
2. Ferri, A. and Bloom, M.H. "Cooling by Jets Directed Upstream in Hypersonic Flow," WADC Technical Note 56-382,Sept.1957.