1. Armstrong B H and Nicholls R W 1972Emission Absorption and Transfer of Radiation in Heated Atmospheres (Oxford: Pergamon Press) p. 47
2. Armstrong L Jr, Fielder W R and Lin D L 1976Phys. Rev. A14 1114
3. Burns G 1964J. Chem. Phys. 41 1521
4. Carson T R 1971Progress in High Temperature Physics and Chemistry (Oxford: Pergamon Press) Vol. 4, pp. 99, 112
5. Cheng K T and Johnson W R 1976Phys. Rev. A15 1326