Ma, Ru Yun Solvability of a class of fourth-order periodic boundary value problems. (Chinese) Zbl 0900.34017 Acta Math. Sci. (Chin. Ed.) 15, No. 3, 315-318 (1995). Cited in 2 Documents MSC: 34B15 Nonlinear boundary value problems for ordinary differential equations 34C25 Periodic solutions to ordinary differential equations PDFBibTeX XMLCite \textit{R. Y. Ma}, Acta Math. Sci. (Chin. Ed.) 15, No. 3, 315--318 (1995; Zbl 0900.34017)