TY  - JOUR
AU  - F. I. Kagan
TI  - Lifts as isomorphisms of graded algebras
JO  - Matematičeskie zametki
PY  - 1971
SP  - 239
EP  - 247
VL  - 9
IS  - 3
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1971_9_3_a1/
LA  - ru
ID  - MZM_1971_9_3_a1
ER  -