1. Konstantinov B.P, Kocharov G.E.: 1965, Dokl. AN SSSR, v. 165, p. 63 (in Russian).
2. Wolfsberg K. Kocharov G.E.: 1991 In: The Sun in time eds. C.P. Sonett M.S. Giampapa M.S. Mattheus Tuscon pp. 288–313
3. Cecchini S., Galli V., Nanni T., Ruggiero L.: 1996, Nuovo Cimento, v. 19C, _4, pp. 527–532.
4. Kocharov G.E., Vasiliev V.A., Dergachev V.A., Ostryakov V.A.: 1983, Pis’ma A. Zh., v.9, p. 206 (in russian).
5. Suess H.E.: 1978, Radiocarbon, v. 20, p.1.