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16.VAN DER POL B, VAN DER MARK J. LXXII. The heartbeat considered as a relaxation oscillation, and an electrical model of the heart[J]. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1928, 6(38): 763-775. DOI:10.1080/14786441108564652.

16.VAN DER POL B, VAN DER MARK J. LXXII. The heartbeat considered as a relaxation oscillation, and an electrical model of the heart[J]. The London, Edinburgh, and Dublin Philosophical Magazine and Journal of Science, 1928, 6(38): 763-775. DOI:10.1080/14786441108564652.

17.GRUDZIŃSKI K, ŻEBROWSKI J J. Modeling cardiac pacemakers with relaxation oscillators[J]. Physica A: Statistical Mechanics and Its Applications, 2004, 336(1-2): 153-162. DOI:10.1016/j.physa.2004.01.016.

17.GRUDZIŃSKI K, ŻEBROWSKI J J. Modeling cardiac pacemakers with relaxation oscillators[J]. Physica A: Statistical Mechanics and Its Applications, 2004, 336(1-2): 153-162. DOI:10.1016/j.physa.2004.01.016.

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==署名==

==署名==