Murasugi, Kunio and Przytycki, Jozef H.  <br/><br/>
Index of a graph with applications to knot theory  
Murasugi, Kunio and Przytycki, Jozef H.  
 -   American Mathematical Society  1993 
<br/><br/><label>Dewey Class. No.: </label>511.5  / N93 MUR.P