Bernfeld, S. R. Exchange of stability of an equilibrium of homogeneous planar differential systems. (English) Zbl 0844.34048 Nonlinear Anal., Theory Methods Appl. 25, No. 9-10, 873-883 (1995). Reviewer: P.Habets (Louvain-La-Neuve) MSC: 34D20 34C23 PDFBibTeX XMLCite \textit{S. R. Bernfeld}, Nonlinear Anal., Theory Methods Appl. 25, No. 9--10, 873--883 (1995; Zbl 0844.34048) Full Text: DOI
Bernfeld, S. R. Existence and stability of bifurcating tori in a neighborhood of an equilibrium position. (English) Zbl 0728.34056 J. Math. Anal. Appl. 155, No. 2, 541-561 (1991). Reviewer: A.Steindl (Wien) MSC: 34D35 34C23 34C15 34C20 PDFBibTeX XMLCite \textit{S. R. Bernfeld}, J. Math. Anal. Appl. 155, No. 2, 541--561 (1991; Zbl 0728.34056) Full Text: DOI