Uniform convergence of monotone iterative methods for semilinear singularly perturbed problems of elliptic and parabolic types. Boglaev, Igor (2005) ETNA. Electronic Transactions on Numerical Analysis [electronic only]
Uniformly Convergent Difference Schemes for Singularly Perturbed Parabolic Diffusion-Convection Problems Without Turning Points. Eugene O'Riordan, Martin Stynes (1987) Numerische Mathematik