TY  - JOUR
AU  - A. F. Lapko
TI  - In Academy of Sciences
JO  - Trudy Matematicheskogo Instituta imeni V.A. Steklova
PY  - 1965
VL  - 20
IS  - 1
UR  - http://geodesic.mathdoc.fr/item/RM_1965_20_1_a23/
LA  - ru
ID  - RM_1965_20_1_a23
ER  -