%0 Journal Article %A Giulio Ciraolo %A Rolando Magnanini %A Shigeru Sakaguchi %T Symmetry of minimizers with a level surface parallel to the boundary %J Journal of the European Mathematical Society %D 2015 %P 2789-2804 %V 17 %N 11 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4171/jems/571/ %R 10.4171/jems/571 %F JEMS_2015_17_11_a2