Roos H. Robust numerical methods for singularly perturbed differential equations : convection-diffusion-reaction and flow problems / H. Roos, L. Tobiska, M. Stynes, 2008 r=on-line. - Текст : электронный.
Grossmann C. Numerical treatment of partial differential equations : translated and revised by Martin Stynes / C. Grossmann, H. Roos, 2007 r=on-line