Gohberg, I. C. <br/><br/>
Introduction to the theory of linear non selfadjoint operators  / 

 - Providence:  American Mathematical Society,  1969 
 - xv, 378p. Index 
 - AMS translations of Mathematical monographs   v. 18 .
<br/><br/> "Tr. from the Russian by A. Feinstein". 
<br/><br/><label>Dewey Class. No.: </label>515.72  / G614.IT