Perturbation Methods in Applied Mathematics: 34 (Applied Mathematical Sciences, 34)

Introduction to Perturbation Methods: 20 (Texts in Applied Mathematics, 20)

Perturbation Methods: 6 (Cambridge Texts in Applied Mathematics, Series Number 6)

The Matrix Perturbation Method in Quantum Mechanics

A Study of Numerical Schemes Applied to Singular Perturbation Problems: A Numerical Study of Singularly Perturbed Differential Equations Exhibiting Boundary and Interior Layers