%0 Journal Article %A V. G. Maz'ya %A S. A. Nazarov %T The vertex of a cone can be nonregular in the Wiener sense for a fourth-order elliptic equation %J Matematičeskie zametki %D 1986 %P 24-28 %V 39 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MZM_1986_39_1_a2/ %G ru %F MZM_1986_39_1_a2