Kirillov, A.A.. <br/><br/>
Theorems and Problems in Functional Analysis /  

 - 1st ed /  
 - New York 10010 :   Springer-Verlag ,   1985 
 - p.347 :  
<br/><br/><label>ISBN: </label>0-387-90638-X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>B43  / M2