1. M. N. Kogan, Rarefied Gasdynamics, Plenum (1970).
2. H. L. Pond, ?The effect of entrance velocity on the flow of a rarefied gas through a tube,? J. Aerosp. Sci.,29, No. 8 (1962).
3. T. H. De Leeuw and D. E. Rothe, ?A numerical solution for the free-molecular impact-pressure probe relations for tubes of arbitrary length,? Univ. Toronto Inst. Aerophys., Rep. 88 (1962).
4. I. S. Borovkov and I. D. Vershinin, ?The mass flow coefficient of an air intake in the free-molecular regime,? Uch. Zap. Tsentr. Aéro-Gidrodinam. Inst.,1, No. 5 (1970).
5. V. I. Bogomazov, Yu. E. Kuznetsov, and V. A. Nosik, ?The characteristics of cylindrical air intakes in free-molecular flow,? Uch. Zap. Tsentr. Aéro-Gidrodinam. Inst.,1, No. 5 (1970).