Zill, Dennis G. <br/><br/>
Differential equations with boundary-value problems 
Dennis G. Zill 
 - 8th ed. 
 - Andover  Cengage learning  2013 
 - xv, 549p. 
<br/><br/><label>ISBN: </label>9788131525760 
<br/><br/><label>Dewey Class. No.: </label>515.35 Z651D-8