Kleinrock, Leonard. <br/><br/>
Queueing systems.  vol. 1:  Theory. 

 - New York:  Wiley J.,  1975. 
 - 417 p.: 
<br/><br/><label>ISBN: </label>0471491101 
<br/><br/><label>Dewey Class. No.: </label>519.82  / K64q