%0 Journal Article %A K. Fukaya %T Collapsing of Riemannian manifolds and eigenvalues of La-place operator. %J Inventiones mathematicae %D 1987 %P 517-548 %V 87 %I mathdoc %U http://geodesic.mathdoc.fr/item/IM_1987__87_143434/ %F IM_1987__87_143434