1. Ordinary Differential Equations;Arnol'd,1992
2. On Some Classes of Continuable Solutions of a Nonlinear Differential Equation
3. Asymptotic Behavior and Stability Problems in Ordinary Differential Equation;Cesari,1971
4. Stability and Asymptotic Behavior of Differential Equations;Coppel,1965
5. Differential Equations, Dynamical Systems, and Linear Algebra;Hirsch,1974