@article{IVM_2020_10_a1,
     author = {V. V. Volchkov and Vit. V. Volchkov},
     title = {On the radial symmetry property for harmonic functions},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {12--23},
     publisher = {mathdoc},
     number = {10},
     year = {2020},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2020_10_a1/}
}