Evtushik, L. E. Geometry of ordinary differential equations. Investigations of Laptev-Vasil’ev seminar at the Moscow University (1980-1992). (English) Zbl 0849.34010 J. Math. Sci., New York 78, No. 3, 253-286 (1996). Reviewer: A.D.Osborne (Keele) MSC: 34A26 34-03 01A65 PDFBibTeX XMLCite \textit{L. E. Evtushik}, J. Math. Sci., New York 78, No. 3, 253--286 (1996; Zbl 0849.34010) Full Text: DOI
Stepanov, N. V. Geometry of differential equations. (English) Zbl 0501.58002 J. Sov. Math. 21, 200-231 (1983). MSC: 58-02 34Cxx 34-02 37C10 PDFBibTeX XMLCite \textit{N. V. Stepanov}, J. Sov. Math. 21, 200--231 (1983; Zbl 0501.58002) Full Text: DOI