Apostol, Tom M.. <br/><br/>
Mathematical Analysis: A Modern Approach to Advanced Calculus /  

 - Sixth Printing 1973 /  
 - Massachusetts :   Addison-Wesley Publishing Company. 
 - p.559 :  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B32  / J7;8