Nonlinear ordinary differential equations

Nonlinear Systems and Their Remarkable Mathematical Structures

Norbert Euler

Differential Equations and Dynamical Systems

Lawrence Perko

Theory of differential equations

Andrew Russell Forsyth

Nonlinear ordinary differential equations

D. W. Jordan

Nonlinear mappings of monotone type

Dan Pascali

Nonlinear differential equations in ordered spaces

S. Carl

MONOTONE FLOWS AND RAPID CONVERGENCE FOR NONLINEAR PARTIAL DIFFERENTIAL EQUATIONS

V. LAKSHMIKANTHAM

Nonlinear methods in Riemannian and Kählerian geometry

Jürgen Jost

Oscillation Theory, Computation, and Methods of Compensated Compactnes

Constantine Dafermos