Xia, Hongqiang Melnikov vector function of second order. (Chinese. English summary) Zbl 0915.34036 Acta Math. Sci. (Chin. Ed.) 18, No. 4, 389-393 (1998). MSC: 34C30 37J40 PDFBibTeX XMLCite \textit{H. Xia}, Acta Math. Sci. (Chin. Ed.) 18, No. 4, 389--393 (1998; Zbl 0915.34036)
Xia, Hongqiang Exponential dichotomy and invariant manifold. (Chinese. English summary) Zbl 0905.34043 Acta Math. Sci. (Chin. Ed.) 18, No. 2, 200-205 (1998). MSC: 34C45 PDFBibTeX XMLCite \textit{H. Xia}, Acta Math. Sci. (Chin. Ed.) 18, No. 2, 200--205 (1998; Zbl 0905.34043)