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@article{IVM_2001_4_a11, author = {Vit. V. Volchkov}, title = {A~local two-radii theorem for $\mathcal M$-harmonic functions}, journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika}, pages = {65--68}, publisher = {mathdoc}, number = {4}, year = {2001}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/IVM_2001_4_a11/} }
Vit. V. Volchkov. A~local two-radii theorem for $\mathcal M$-harmonic functions. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 4 (2001), pp. 65-68. http://geodesic.mathdoc.fr/item/IVM_2001_4_a11/