@article{PORMA_1982__41_1-4_115509,
     author = {Grisvard, Pierre},
     title = {Singular solutions of elliptic boundary value problems in polyhedra},
     journal = {Portugaliae mathematica},
     pages = {367--382},
     publisher = {mathdoc},
     volume = {41},
     number = {1-4},
     year = {1982},
     mrnumber = {0766865},
     zbl = {0567.35025},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_1982__41_1-4_115509/}
}