TY  - JOUR
AU  - A. A. Lyapunov
TI  - The covering of $A$-sets, and multiple separability
JO  - Doklady Akademii Nauk
PY  - 1970
SP  - 775
EP  - 776
VL  - 190
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1970_190_4_a8/
LA  - ru
ID  - DAN_1970_190_4_a8
ER  -