TY  - JOUR
AU  - Bican, Ladislav
TI  - On torsionfree classes which are not precover classes
JO  - Czechoslovak Mathematical Journal
PY  - 2008
SP  - 561
EP  - 568
VL  - 58
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMJ_2008__58_2_a18/
LA  - en
ID  - CMJ_2008__58_2_a18
ER  -