Wiktor Eckhaus <br/><br/>
Matched Asymptoic Expansions and Singular Perturbations  

 - New York   Elsevier Publishing Company  1973 
 - 145 
<br/><br/><label>ISBN: </label>444104380 
<br/><br/><label>Dewey Class. No.: </label>515.35  / KCK