%0 Journal Article %A Luigi Fontana %T Sharp borderline Sobolev inequalities on compact Riemannian manifolds. %J Commentarii mathematici Helvetici %D 1993 %P 415-454 %V 68 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMH_1993__68_2_140310/ %F CMH_1993__68_2_140310