%0 Generic
%A de Fraysseix, Hubert
%A Ossona de Mendez, Patrice
%D 2007
%F gdea_3:750
%N 4
%P 453-463
%T On representations by contact and intersection of segments
%U http://gdea.informatik.uni-koeln.de/750/
%V 47
%X A necessary and sufficient condition is given for a connected bipartite graph to be the incidence graph of a contact family of segments and points. We deduce that any 4-connected 3-colorable plane graph is the contact graph of a family of segments and that any 4-colored planar graph without an induced C4 using 4 colors is the intersection graph of a family of straight line segments.