MAA 5228 or C.I.
P. Waltman, A Second Course in Elementary Differential Equations
R. Grimshaw, Nonlinear Ordinary Differential Equations, Taylor 1993
J. Grasman, Asymptotic Methodes of F/relaxation Oscilla, Springer,
Existence and uniqueness of solutions of differential equations, systems of ordinary differential equations, autonomous systems, phase plane analysis, stability, bifurcations.