%0 Journal Article %A Ohtsuki, Tomotada %T A filtration of the set of integral homological 3-spheres %J Documenta mathematica %D 1998 %P 473-482 %V ICM Berlin 1998, Vol. II %I mathdoc %U http://geodesic.mathdoc.fr/item/DOCMA_1998__S8__a36/ %G en %F DOCMA_1998__S8__a36