Colojoara, Ion and Foias, Ciprian <br/><br/>
Theory of generalized spectral operators   

 - New York  Gordon & Breach  1968 
 - xvi, 232p. 
 - Mathematics and applications   v. 9 .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>515.72  / C718.TG