1. Hermann Dzh, Р, Goldberg R.A. [The Sun, weather, climate], Gidrometeoizdat, Leningrad, 319 p. (1981) (in Russian).
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3. No dependence of the temperature of the troposphere at Berlin on the solar activity cycle
4. Komitov B.P. “On possible influence of solar activity on a climate in Bulgaria,” Solar data, 5, 73–78 (1986) (in Russian).
5. 11-year climate variations in Switzerland for 1700–1989 and solar activity;Pudovkin,2000