%0 Journal Article %A H. Shahgholian %T When does the free boundary enter into corner points of the fixed boundary? %J Zapiski Nauchnykh Seminarov POMI %D 2004 %P 213-225 %V 310 %U http://geodesic.mathdoc.fr/item/ZNSL_2004_310_a10/ %G en %F ZNSL_2004_310_a10