Hale, J. K. Oscillations in nonlinear systems. (English) Zbl 0115.07401 McGraw-Hill Series in Advanced Mathematics with Applications. New York etc.: McGraw-Hill Book Company, Inc. IX, 180 p. (1963). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 ReviewCited in 151 Documents Keywords:ordinary differential equations PDF BibTeX XML