Ziegler, Gerhard. <br/><br/>
Numerical Distance Protection.  Principles and Applications. 

 - Erlangen.  Publicis Corporate Publishing.  2006 
 - 378p.,25x18cms 
<br/><br/><label>ISBN: </label>9783895782664 
<br/><br/><label>Dewey Class. No.: </label>621.382 Z65