On Hereditary Helly Classes of Graphs.

Marina Groshaus Jayme Luiz Szwarcfiter On Hereditary Helly Classes of Graphs. 2008 10 Discrete Mathematics & Theoretical Computer Science 1 http://www.dmtcs.org/dmtcs-ojs/index.php/dmtcs/article/view/744/2187 db/journals/dmtcs/dmtcs10.html#GroshausS08