%0 Journal Article %A D'Aprile, Teresa %T Behaviour of symmetric solutions of a nonlinear elliptic field equation in the semi-classical limit: Concentration around a circle %J Electronic Journal of Differential Equations %D 2000 %V 2000 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a193/ %G en %F EJDE_2000__2000__a193