Copson, E.T.. <br/><br/>
Partial Differential Equations /  

 - 1st ed /  
 - New Delhi-55 :   S. Chand & Co Pvt. Ltd.. 
 - p.280 :  
<br/><br/><label>ISBN: </label>0521-20583-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics 
<br/><br/><label>Dewey Class. No.: </label>B334  / L5C;4