Birkhoff, Garrett. <br/><br/>
Ordinary differential equations / 
Garrett Birkhoff, Gian-Carlo Rota. 
 - 3rd ed. 
 - New York :  Wiley,  c1978. 
 - xi, 342 p. 
<br/><br/><label>ISBN: </label>047107411X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations.