Sunyaev, R. A. (1974). „The Thermal History of the Universe and the Spectrum of Relic Radiation”. Ур.: Longair, M. S. The thermal history of the universe and the spectrum of relic radiation. Confrontation of Cosmological Theories with Observational Data. IAUS. 63. Dordrecht: Springer. стр. 167—173. Bibcode:1974IAUS...63..167S. ISBN978-90-277-0457-3. doi:10.1007/978-94-010-2220-0_14.
Sunyaev, R. A. (1974). „The Thermal History of the Universe and the Spectrum of Relic Radiation”. Ур.: Longair, M. S. The thermal history of the universe and the spectrum of relic radiation. Confrontation of Cosmological Theories with Observational Data. IAUS. 63. Dordrecht: Springer. стр. 167—173. Bibcode:1974IAUS...63..167S. ISBN978-90-277-0457-3. doi:10.1007/978-94-010-2220-0_14.