@article{MS2_1963__13_165852,
     author = {Rolf Andersson},
     title = {Unbounded {Soboleff} {Regions.}},
     journal = {Mathematica Scandinavica},
     pages = {75--89},
     publisher = {mathdoc},
     volume = {13},
     year = {1963},
     zbl = {0131.32604},
     url = {http://geodesic.mathdoc.fr/item/MS2_1963__13_165852/}
}