1. N. A. Gusak and A. M. Goncharenko, Zh. Prikl. Spektrosk.,11, No. 2 (1969).
2. É. P. Zege, Zh. Prikl. Spektrosk.,10, No. 6 (1969).
3. A. P. Ivanov, Optics of Scattering Media [in Russian], Nauka i Tekhnika, Minsk (1969).
4. A. P. Ivanov and É. B. Khodos, Opt. Spektrosk.,8, No. 4 (1960).
5. S. G. Il'yasov and V. V. Krasnikov, Methods for the Determination of Optical and Thermoradiative Characteristics of Food Products [in Russian], Pishchevaya Prom-st', Moscow (1972).