1. E. P. Borisenkov and V. M. Pasetskii, Extreme Natural Phenomena in Russian Chronicles of the XI–XVII Centuries (Gidrometeoizdat, Leningrad, 1983) [in Russian].
2. V. B. Shostakovitch, “Forest conflagrations in Siberia,” J. For. 23 (4), 365–371 (1925).
3. P. Crutzen and J. Birks, “Twilight at noon: The atmosphere after a nuclear war,” AMBIO 11 (2-3), 114–125 (1982).
4. R. P. Turco, O. B. Toon, T. P. Ackerman, J. B. Pollack, and C. Sagan, “Nuclear winter: Global consequences of multiple nuclear explosions,” Science 222 (4630), 1283–1292 (1983).
5. G. S. Golitsyn, “New developments from USSR,” Environ. Sci. Policy Sustain. Dev. 28 (8), 2–44 (1986).