%0 Journal Article %A Gregory Galloway %T Some rigidity results for spatially closed spacetimes %J Banach Center Publications %D 1997 %P 21-34 %V 41 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/-41-1-21-34/ %R 10.4064/-41-1-21-34 %G en %F 10_4064__41_1_21_34