%0 Journal Article %A M. Biliotti %A Gabor Korchmaros %T Blocking sets which are preserved by transitive collineation groups. %J Forum mathematicum %D 1992 %P 567-592 %V 4 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141692/ %F FORUM_1992__4_6_141692