1. G. A. Bird,Molecular Gas Dynamics(Oxford University Press, London, 1976).
2. Breakdown of translational and rotational equilibrium in gaseous expansions
3. A. U. Chatwani, presented at the XIth International Symposium on Rarefied Gas Dynamics, Cannes (1978).
4. Relaxation rates from time of flight analysis of molecular beams
5. D. R. Willis and B. B. Hamel, inRarefield Gas Dynamics, edited by C. L. Brundin (Academic, New York, 1967), p. 837.