%0 Journal Article %A Karl Friedrich Siburg %T Symplectic capacities in two dimensions. %J Manuscripta mathematica %D 1993 %P 149-164 %V 78 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1993__78_4_155801/ %F MM2_1993__78_4_155801