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6.VAN DER POL B, VAN DER MARK J. Frequency demultiplication[J]. Nature, 1927, 120(3019): 363-364. DOI:10.1038/120363a0.
 
6.VAN DER POL B, VAN DER MARK J. Frequency demultiplication[J]. Nature, 1927, 120(3019): 363-364. DOI:10.1038/120363a0.
 
7.https://www.phys.uconn.edu/~rozman/Courses/P2200_13F/downloads/vanderpol/vanderpol-oscillator-draft.pdf
 
7.https://www.phys.uconn.edu/~rozman/Courses/P2200_13F/downloads/vanderpol/vanderpol-oscillator-draft.pdf
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8.C. Hayashi, H. Shibayama, and Y. Ueda. "Quasi-periodic Oscillations in Self-oscillatory Systems with External Force." (In Japanese), IECE Technical Report, Nonlinear Theory, 16 December 1961.
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==署名==
 
==署名==
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