Eckhaus, Wiktor <br/><br/>
North-Holland Mathematics Studies  Matched Asymptotic Expansions and Singular Perturbations 
Wiktor Eckhaus 
 - London  North-Holland Publishing Company  1973 
 - iii, 145p. 
<br/><br/><label>ISBN: </label>0444104380 
<br/><br/><label>Dewey Class. No.: </label>519  / ECK/M