%0 Journal Article %A Robert Molzon %T Symmetry and Overdetermined Boundary Value Problems. %J Forum mathematicum %D 1991 %P 143-156 %V 3 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/FORUM_1991__3_2_186416/ %F FORUM_1991__3_2_186416