%0 Journal Article %A Taylor, Laurence R %T An invariant of smooth 4–manifolds %J Geometry & topology %D 1997 %P 71-89 %V 1 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.2140/gt.1997.1.71/ %R 10.2140/gt.1997.1.71 %F GT_1997_1_1_a5