Birkhoff, Garrett. <br/><br/>
Ordinary differential equations / 
Garrett Birkhoff, Gian-Carlo Rota. 
 - 4th ed. 
 - India  John Wiley & Sons,  2003. 
 - 399 p. ;  22 cm. 
<br/><br/><label>ISBN: </label>9812530029 9812530029 
<br/><br/><label>Dewey Class. No.: </label>515.352