TY  - JOUR
AU  - A. V. Shokurov
TI  - On the homotopy and homology realization of exact sequences of groups
JO  - Sbornik. Mathematics
PY  - 1975
SP  - 77
EP  - 86
VL  - 25
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/SM_1975_25_1_a4/
LA  - en
ID  - SM_1975_25_1_a4
ER  -