Lovasz, Laszlo  Vesztergombi, Katalin L.  Pelikan, Jozsef <br/><br/>
Discrete Mathematics   

 -  Springer-Verlag New York, Incorporated  2003. 
 - 301 
<br/><br/><label>ISBN: </label>0387217770 
<br/><br/><label>Dewey Class. No.: </label>510  /