Symeon Bozapalidis Antonios Kalampakas A Finite Complete Set of Equations Generating Graphs. 118-128 2003 conf/dmtcs/2003 DMTCS http://link.springer.de/link/service/series/0558/bibs/2731/27310118.htm db/conf/dmtcs/dmtcs2003.html#BozapalidisK03