1. M. A. Heaslet and R. F. Warming, Internatl. J. Heat and Mass Transfer,8, No. 7 (1965).
2. M. A. Heaslet and R. F. Warming, Internatl. J. Heat and Mass Transfer,10, No. 10 (1967).
3. A. L. Grosbie and R. Viskanta, JQSRT,9, No. 5 (1969).
4. E. M. Sparrow and R. D. Cess, Radiative Heat Transfer, Cole Books Publ. Co., Belmont California (1966).
5. Yu. D. Sokolov, Method of Averaging Functional Corrections [in Russian], Izd. Naukova Dumka, Kiev (1967).