Żołądek, Henryk Analytic ordinary differential equations and their local classification. (English) Zbl 1191.34001 Battelli, Flaviano (ed.) et al., Handbook of differential equations: Ordinary differential equations. Vol. IV. Amsterdam: Elsevier/North Holland (ISBN 978-0-444-53031-8/hbk). Handbook of Differential Equations, 593-687 (2008). Reviewer: Vladimir P. Kostov (Nice) MSC: 34-02 34M35 34M40 32S65 PDFBibTeX XMLCite \textit{H. Żołądek}, in: Handbook of differential equations: Ordinary differential equations. Vol. IV. Amsterdam: Elsevier/North Holland. 593--687 (2008; Zbl 1191.34001)
Rousseau, Christiane Modulus of orbital analytic classification for a family unfolding a saddle-node. (English) Zbl 1089.37018 Mosc. Math. J. 5, No. 1, 245-268 (2005). Reviewer: Boris V. Loginov (Ul’yanovsk) MSC: 37C15 34M35 37C05 37C10 PDFBibTeX XMLCite \textit{C. Rousseau}, Mosc. Math. J. 5, No. 1, 245--268 (2005; Zbl 1089.37018)
Glutsyuk, A. A. Confluence of singular points and nonlinear Stokes phenomenon. (English. Russian original) Zbl 1004.34081 Trans. Mosc. Math. Soc. 2001, 49-95 (2001); translation from Tr. Mosk. Mat. O.-va 62, 54-104 (2001). Reviewer: V.P.Kostov (Nice) MSC: 34M40 32G34 34M35 37F75 PDFBibTeX XMLCite \textit{A. A. Glutsyuk}, Trans. Mosc. Math. Soc. 2001, 49--95 (2001; Zbl 1004.34081); translation from Tr. Mosk. Mat. O.-va 62, 54--104 (2001)