TY  - JOUR
AU  - V. M. Millionshchikov
TI  - Letter to the editor
JO  - Matematičeskie zametki
PY  - 1974
SP  - 833
VL  - 15
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1974_15_5_a19/
LA  - ru
ID  - MZM_1974_15_5_a19
ER  -