TY  - JOUR
AU  - Zelinka, Bohdan
TI  - On a problem of R. Halin concerning subgraphs of infinite graphs
JO  - Mathematica slovaca
PY  - 1977
SP  - 43
EP  - 45
VL  - 27
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MASLO_1977__27_1_a5/
LA  - en
ID  - MASLO_1977__27_1_a5
ER  -