Brauer, Fred., <br/><br/>
Ordinary differential equations 
a first course by Fred Brauer and John A. Nohel 
 - New York  W. A. Benjamin  1967 
 - xvi, 457 pages. :  illustrations. ;  24 cm. 
<br/><br/>p. 429-430. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations