%0 Journal Article %A Charles E. Killian %A Frank Ruskey %A Carla D. Savage %A Mark Weston %T Half-simple symmetric Venn diagrams %J The electronic journal of combinatorics %D 2004 %V 11 %N 1 %U http://geodesic.mathdoc.fr/articles/10.37236/1839/ %R 10.37236/1839 %F 10_37236_1839