1. Quantitative Molecular Spectroscopy and Gas Emissivities;PENNER,1959
2. Radiative Transfer;CHANDRASEKHAR,1950
3. Basic Methods in Transfer Problems;KOURGANOFF,1952
4. THOMSON, J. A. L. Gruen Applied Science Laboratories Report, Pasadena, California, April 1957.
5. Reference 1, Chap. 13.