@article{MAN_1993__297_3_165123,
     author = {W. Hansen and I. Netuka},
     title = {Inverse mean value property of harmonic functions.},
     journal = {Mathematische Annalen},
     pages = {147--156},
     publisher = {mathdoc},
     volume = {297},
     number = {3},
     year = {1993},
     zbl = {0794.31001},
     url = {http://geodesic.mathdoc.fr/item/MAN_1993__297_3_165123/}
}