Dimitrovski, Dragan; Rajović, Vladimir A contribution to the problem of coexistence of two periodical solutions of the Hill’s equation. (English) Zbl 1224.34119 Kragujevac J. Math. 30, 99-117 (2007). Cited in 1 Document MSC: 34C25 Periodic solutions to ordinary differential equations Keywords:Hill’s equation; periodic solutions PDF BibTeX XML Cite \textit{D. Dimitrovski} and \textit{V. Rajović}, Kragujevac J. Math. 30, 99--117 (2007; Zbl 1224.34119)