Introduction to Singular Perturbations

Local Theory of Nonlinear Analytic Ordinary Differential Equations

Perturbation Methods

Superconvergence in Galerkin Finite Element Methods

Finite Element Methods: Superconvergence, Post-Processing, and a Posteriori Estimates, Vol. 196

Asymptotics and Special Functions

Similarity Methods for Differential Equations

Matching of Asymptotic Expansions of Solutions of Boundary Value Problems

Almost Periodic Differential Equations

Almost periodic solutions of differential equations in Banach spaces

Asymptotic Analysis