TY  - JOUR
TI  - Meetings of the Leningrad Mathematical Society
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1969
VL  - 24
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RM_1969_24_4_a18/
LA  - ru
ID  - RM_1969_24_4_a18
ER  -