Hill, Einer <br/><br/>
Ordinary differential equations in the complex domain   
by Einar Hille 
 - New York  Dover publication, Inc.  1997 
 - xi, 484p 
<br/><br/><label>ISBN: </label>0486696200 
<br/><br/><label>Dewey Class. No.: </label>515.94  / N761