Morris, G. R. An infinite class of periodic solutions \(\ddot x+2x^ 3 = p(t)\). (English) Zbl 0134.07203 Proc. Camb. Philos. Soc. 61, 157-164 (1965). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 16 Documents Keywords:ordinary differential equations PDF BibTeX XML Cite \textit{G. R. Morris}, Proc. Camb. Philos. Soc. 61, 157--164 (1965; Zbl 0134.07203) OpenURL