Nagrath, I.J. <br/><br/>
Modern power system analysis 
I.J. Nagrath, D.P. Kothari. 
 - 2nd  ed. 
 - New Delhi  Tata McGrawHill Publications  1989 
 - xiv, 518p., 22cm. 
<br/><br/><label>ISBN: </label>0-07-451799-6. 
<br/><br/><label>Dewey Class. No.: </label>621.3191  / N13M