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Additional information
Odessa Pedagogical Institute. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii. Radiofizika, Vol. 17, No. 8, pp. 1126–1130, August, 1974.
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Al'perin, M.M., Klubis, Y.D. On a relaxation theory for two-level systems. Radiophys Quantum Electron 17, 857–860 (1974). https://doi.org/10.1007/BF01037078
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DOI: https://doi.org/10.1007/BF01037078