Feng, Yanqing; Gao, Feng; Wang, Zhongying; Chen, Rongjun Existence and uniqueness of solutions for periodically perturbed conservative systems. (English) Zbl 1249.34124 J. Sichuan Norm. Univ., Nat. Sci. 34, No. 5, 651-654 (2011). MSC: 34C25 37J40 PDFBibTeX XMLCite \textit{Y. Feng} et al., J. Sichuan Norm. Univ., Nat. Sci. 34, No. 5, 651--654 (2011; Zbl 1249.34124) Full Text: DOI
Feng, Yanqing; Wang, Zhongying; Chen, Rongjun A resonance condition in the periodic boundary for a \(2k\)th order differential equation. (English) Zbl 1240.34072 J. Anhui Univ., Nat. Sci. 35, No. 1, 10-14 (2011). MSC: 34B15 34C25 PDFBibTeX XMLCite \textit{Y. Feng} et al., J. Anhui Univ., Nat. Sci. 35, No. 1, 10--14 (2011; Zbl 1240.34072)