Wasow, Wolfgang <br/><br/>
Asymptotic expansions for ordinary differential equations  / 

 - New York:  Dover,  1987 
 - ix, 374p. Index, Bibl. 
<br/><br/> "First published by Interscience publishers, New York, 1965 as vol.14 in the Pure and Applied Mathematic series" 
<br/><br/><label>Dewey Class. No.: </label>515.35  / W319.AE