TY  - JOUR
AU  - R. G. Alizade
TI  - Characteristic classes (purities) of short exact sequences in the category of Abelian groups
JO  - Matematičeskie zametki
PY  - 1986
SP  - 3
EP  - 15
VL  - 40
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZM_1986_40_1_a0/
LA  - ru
ID  - MZM_1986_40_1_a0
ER  -