Asmar, Nakhle H. <br/><br/>
Partial differential equations:with fourier series and boundary value problems 

 - 3rd ed.. 
 -  Dover publications  2016 
<br/><br/><label>ISBN: </label>9780486807379 
<br/><br/><label>Dewey Class. No.: </label>515.355  / T16 ASM