O'Malley Jr., R.E <br/><br/>
Introduction to singular perturbations 
R.E. O'Malley Jr. 
 - New York  Academic Press  1974 
 - viii  206 
 - Applied mathematics & mechanics 14 .
<br/><br/><label>ISBN: </label>0125259506 
<br/><br/><label>Dewey Class. No.: </label>4.04  / O'MALL