Boyce, William E., <br/><br/>
Elementary differential equations and boundary value problems 

 - 7th ed. 
 - Singapore:  John Wiley,  2001. 
 - xvi, 745 p. :   ill. (some col.);  26 cm. 
<br/><br/> Includes index 
<br/><br/><label>ISBN: </label>9812530061 9789812530066 
<br/><br/><label>Dewey Class. No.: </label>515.35 BOY (12)