TY  - JOUR
AU  - V. V. Volchkov
TI  - New theorems on the~mean for solutions of the~Helmholtz equation
JO  - Sbornik. Mathematics
PY  - 1994
SP  - 281
EP  - 286
VL  - 79
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1994_79_2_a2/
LA  - en
ID  - SM_1994_79_2_a2
ER  -