TY  - JOUR
AU  - I. S. Belov
TI  - Subharmonicity of the powers of the modulus of the gradient of a~harmonic function
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1976
VL  - 31
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1976_31_4_a13/
LA  - ru
ID  - RM_1976_31_4_a13
ER  -