@article{FORUM_1991__3_2_186416,
     author = {Robert Molzon},
     title = {Symmetry and {Overdetermined} {Boundary} {Value} {Problems.}},
     journal = {Forum mathematicum},
     pages = {143--156},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1991},
     zbl = {0789.35118},
     url = {http://geodesic.mathdoc.fr/item/FORUM_1991__3_2_186416/}
}