TY  - JOUR
AU  - Samuel Eilenberg
TI  - Relations between cohomology groups in a complex.
JO  - Commentarii mathematici Helvetici
PY  - 1948
SP  - 302
EP  - 320
VL  - 21
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMH_1948__21_138949/
ID  - CMH_1948__21_138949
ER  -