TY  - JOUR
AU  - I. Berstein
TI  - On co-groups in the category of graded algebras
JO  - Matematika
PY  - 1966
SP  - 32
EP  - 44
VL  - 10
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MAT_1966_10_4_a1/
LA  - ru
ID  - MAT_1966_10_4_a1
ER  -