TY  - JOUR
AU  - Jakubík, Ján
TI  - On convexities of $d$-groups
JO  - Czechoslovak Mathematical Journal
PY  - 1994
SP  - 305
EP  - 314
VL  - 44
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128457/
DO  - 10.21136/CMJ.1994.128457
LA  - en
ID  - 10_21136_CMJ_1994_128457
ER  -