Smith, Donald R. <br/><br/>
Singular-perturbation theory :  an inroduction with applications / 
by Donald R. Smith. 
 - Cambridge, N.Y. :  Cambridge University Press,  1985. 
 - ix, 500 p. 
<br/><br/><label>ISBN: </label>0521300428 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics.<br/>Differential equations--Numerical solutions.<br/>Perturbation (Mathematics).