TY  - JOUR
AU  - V. V. Filippov
TI  - The preservation of the multiplicity of a basis under a perfect map
JO  - Doklady Akademii Nauk
PY  - 1968
SP  - 1077
EP  - 1079
VL  - 181
IS  - 5
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1968_181_5_a12/
LA  - ru
ID  - DAN_1968_181_5_a12
ER  -