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2. K teorii schotchikov Geiger-Müllera;Gnedenko;Zh. exp. tear. Fiz,1941
3. Probability fluctuation of discharges in a Geiger-Müller counter produced by cosmic radiation;Levert;Physica, 's Grav,1943
4. Sur la théorie stochastique des compteurs;Pollaczek;C.R. Acad. Sci,1954
5. On the frequency distribution of the Geiger-Müller counter in a constant interval;Kosten;Physica, 's Grav,1940