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2. Diffraction of pulses by a circular cylinder;Friedlander;Comm. Pure Appl. Math.,1954
3. Sound Pulses;Friedlander,1958
4. Numerical Methods For Singular Perturbation Problems: Error Estimates in the Maximum Norm for Linear Problems in One and Two Dimensions;Miller,1996
5. Numerical Methods for Singularly Perturbed Differential Equations: Convection-Diffusion and Flow Problems;Roos,1996