paris, R.B. <br/><br/>
Asymptotics of high order differential equations 

 - New York  Longman Scientific & technical  1986 
 - 344p., 23 cm. 
 - Pitman research notes in mathematics series .
<br/><br/><label>ISBN: </label>0582994551 
<br/><br/><label>Dewey Class. No.: </label>515.35,  / DD, Par