%0 Journal Article %A C. Okonek %A A. de Van de Ven %T ...-type-invariants associated to PU(2)-bundles and the differentiable structure of Barlow's surface. %J Inventiones mathematicae %D 1989 %P 601-614 %V 95 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1989__95_3_143669/ %F IM_1989__95_3_143669