1. G. Gamow, The Creation of the Universe (Viking, New York, 1961).
2. A. A. Penzias and R. W. Wilson, Astrophys. J. 142, 419 (1965).
3. M. Planck, Ann. Phys. (Berlin, Ger.) 4, 553 (1901).
4. P. Lubin, T. Villela, G. Epstein, and G. Smoot, Astrophys. J. Lett. 298, L1 (1985).
5. P. A. R. Ade et al., “A Measurements of the Cosmic Microwave Background B-Mode Polarization Power Spectrum at Sub-Degree Scales from 2 Years of Polarbear Data” (Planck Collab.), arXiv:1705.02907v2 [astro-ph. CO] (2017).