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Stichting Mathematisch Centrum
CWI Quarterly
Stochastic Dynamics and Discrete Probability

Shishkin, G., Shishkina, L. P., & Hemker, P. (1997). A numerical method with floating meshes for singularity perturbed problems with a concentrated disturbance in the initial data. CWI Quarterly, 10(3-4), 317–336.