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Additional information
Gorki State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 21, No. 6, pp. 835–843, June, 1978.
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Averkov, S.I. Changes in the amplitude and phase of vibrations in systems with variable parameters. Radiophys Quantum Electron 21, 589–596 (1978). https://doi.org/10.1007/BF01052035
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DOI: https://doi.org/10.1007/BF01052035