Duchateau, PaulZachmann, David W <br/><br/>
Theory and problems of partial differential equations (Schaum's outline series) 

 -  McGraw-Hill,  1986 
 - 241 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Differential equation
<br/><br/><label>Dewey Class. No.: </label>515.353  DUC;2