TY  - JOUR
AU  - V. P. Gromov
TI  - Nontrivial expansion of zero and representative systems of the
JO  - Doklady Akademii Nauk
PY  - 1991
SP  - 801
EP  - 805
VL  - 319
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1991_319_4_a5/
LA  - ru
ID  - DAN_1991_319_4_a5
ER  -