Blackburn, J. Lewis and Domain, Thomas J. <br/><br/>
Protective relaying: principles and applications 

 - 4th ed. 
 -  CRC Press  2014 
<br/><br/><label>ISBN: </label>9781439888117 
<br/><br/><label>Dewey Class. No.: </label>621.317  / T14 BLA D