%0 Journal Article %A Grisvard, Pierre %T Singular solutions of elliptic boundary value problems in polyhedra %J Portugaliae mathematica %D 1982 %P 367-382 %V 41 %N 1-4 %I mathdoc %U http://geodesic.mathdoc.fr/item/PORMA_1982__41_1-4_115509/ %G en %F PORMA_1982__41_1-4_115509