Segal, Irving Ezra <br/><br/>
Decompositions of operator algebras,.  I and II/ 
Irving Ezra Segal. 
 - [1st ed.] 
 - New York:  American Mathematical Society,  1952. 
 - 66 p. 
 - Memoirs of the American Mathematical Society;  9 .
 - Memoirs of the American Mathematical Society;  no. 9. .