Theory of oscillators - Andronov, A. A. (Aleksandr Aleksandrovich), 1901-1952.; Vitt, A. A. (Aleksandr Adolfovich), d. 1937 z; Khaikin, S. E. (Semen Emmanuilovich) b (Oxford Pergamon Press, 1966)
p. 801-811.
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Keywords: Oscillations