1. Yen, S-M. 1966 Phys. Fluids,9,1417.
2. Glass, I. I. & Heuckroth, L. E. 1959 Phys. Fluids,2,542.
3. Denisik, S. A. , Malama, YU G. , Polak, L. S. & Rezvanov, R. A. 1967 Teplofizika Vysokikh Temperatur,5,1011.
4. Chapman, S. & Cowling, T. G. 1960 The Mathematical Theory of Non-Uniform Gases .Cambridge University Press.
5. Bird, G. A. 1969 Rarefied Gas Dynamics (in the press).