1. G. N. Abramovich, Applied Gas Dynamics (Nauka, Moscow, 1976) [in Russian].
2. A. B. Tseitlin, Vapor-Jet Vacuum Pumps (Energiya, Moscow-Leningrad, 1965) [in Russian].
3. D. E. Rothe and I. H. de Leew, “The Free Molecular Impact Pressure Probe of Arbitrary Length,” AIAA J. 1(9), 220–221 (1963).
4. F. C. Hurlbut, “Techniques of Measurements, Flow Visualization,” in Rarefied Gas Dynamics, Proceedings of the First International Symposium held at Nice, Ed. by F.M. Devienne (Pergamon Press, New York, 1960).