Robust numerical methods for singularly perturbed differential equations : 
Roos, Hans-Görg, 
 - 2nd ed. 
 - Berlin :  Springer,  2008 
 - xiv, 604 p. :  ill. ;  25 cm. 
<br/><br/> Rev. ed. of: Numerical methods for singularly perturbed differential equations : convection-diffusion and flow problems / H.-G. Roos, M. Stynes, L. Tobiska. c1996. 
<br/><br/><label>ISBN: </label>9783540344667 (hbk.) | 3540344667 (hbk.)