TY  - JOUR
TI  - Meetings of the Leningrad Mathematical Society
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1980
VL  - 35
IS  - 6
UR  - http://geodesic.mathdoc.fr/item/RM_1980_35_6_a20/
LA  - ru
ID  - RM_1980_35_6_a20
ER  -