TY  - JOUR
AU  - Gelbukh, Irina
TI  - Co-rank and Betti number of a group
JO  - Czechoslovak Mathematical Journal
PY  - 2015
SP  - 565
EP  - 567
VL  - 65
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.1007/s10587-015-0195-0/
DO  - 10.1007/s10587-015-0195-0
LA  - en
ID  - 10_1007_s10587_015_0195_0
ER  -