Publisher
Springer Berlin Heidelberg
Reference17 articles.
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2. see also B. Th. van der Pol and J. van der Mark, ibid. 6(1928) 763, and Arch. Need. Physiol. 14(1929) 418.
3. Also, K. F. Bonhoeffer, J. Gen. Physiol. 32(1948) 69, Naturwissensch. 40(1953)301.
4. R. FitzHugh. In Biological Engineering, H. P. Schwann, ed., pp1–85, McGraw-Hill, 1962.
5. M. L. Cartwright, J. E. Littlewood, Ann. Math. 54(1951)1–37;