John, Fritz, <br/><br/>
Partial differential equations / 
Fritz John 
 - 4th ed. 
 - New York :  Springer-Verlag,  1982 
 - x, 249 pages :  illustration ;  24 cm. 
 - Applied mathematical sciences ;  vol. 1 .
<br/><br/> With 25 figures 
<br/><br/>Bibliography : p. 241-242 
<br/><br/><label>ISBN: </label>0387906096 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equations, Partial