@article{GDZPPN002338556,
title = {Inverse mean value property of harmonic functions.},
journal = {Mathematische Annalen},
volume = {295},
year = {1993},
pages = {147-156},
zbl = {0794.31001},
url = {http://dml.mathdoc.fr/item/GDZPPN002338556}
}
Hansen, W.; Netuka, I. Inverse mean value property of harmonic functions.. Mathematische Annalen, Tome 295 (1993) pp. 147-156. http://gdmltest.u-ga.fr/item/GDZPPN002338556/