TY  - JOUR
AU  - A. Ya. Helemskii
TI  - Homological characterization of factors of type~I
JO  - Doklady Akademii Nauk
PY  - 1995
SP  - 454
EP  - 456
VL  - 344
IS  - 4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/DAN_1995_344_4_a5/
LA  - ru
ID  - DAN_1995_344_4_a5
ER  -