Wasow, Wolfgang. <br/><br/>
Asynptotic expansions for ordinary differential equations   
by Wolfgang Wasow 
 - New York  Interscience Publishers  1966 
 - ix, 362p. 
 - Pure and Applied Mathematics  V.14 .
<br/><br/><label>LCCN: </label>65-26224 
<br/><br/><label>Dewey Class. No.: </label>515.234  / N651;1