A Domain Decomposition Finite Difference Method for Singularly Perturbed Elliptic Equations in Composed Domains. - Irina V. Tselishcheva; Grigorii I. Shishkin (NAA, 2000)

On a Reliable Numerical Method for a Singularly Perturbed Parabolic Reaction-Diffusion Problem in a Doubly Connected Domain. - Irina V. Tselishcheva; Grigorii I. Shishkin (FDM, 2018)