%0 Journal Article %A George Stratopoulos %T A new line Involution and the Classification Process %J Ευκλείδης Γ %D 1989 %P 135-146 %V 21 %U http://geodesic.mathdoc.fr/item/EUG_1989_21_a11/ %G gr %F EUG_1989_21_a11