%0 Journal Article %A Edoardo Ballico %T On rank two vector bundles on an algebraic surface. %J Forum mathematicum %D 1992 %P 231-242 %V 4 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1992__4_6_141673/ %F FORUM_1992__4_6_141673