Lefschetz, Solomon (ed.) Contributions to the theory of nonlinear oscillations. Vol. I. (English) Zbl 1341.34002 Annals of Mathematics Studies 20. Princeton, NJ: Princeton University Press (ISBN 978-0-691-07931-8/pbk; 978-1-4008-8263-2/ebook). x, 354 p. (1950). For Volumes II–V see [Zbl 0046.31501; Zbl 0071.08501; Zbl 0082.30101; Zbl 0095.28902]. Cited in 1 ReviewCited in 9 Documents MSC: 34-06 Proceedings, conferences, collections, etc. pertaining to ordinary differential equations 00B15 Collections of articles of miscellaneous specific interest Citations:Zbl 0046.31501; Zbl 0071.08501; Zbl 0082.30101; Zbl 0095.28902 PDFBibTeX XMLCite \textit{S. Lefschetz} (ed.), Contributions to the theory of nonlinear oscillations. Vol. I. Princeton, NJ: Princeton University Press (1950; Zbl 1341.34002) Full Text: DOI