TY  - JOUR
AU  - Abbott, H. L.
AU  - Moser, L.
TI  - On a Combinatorial Problem of Erdös and Hajnal
JO  - Canadian mathematical bulletin
PY  - 1964
SP  - 177
EP  - 181
VL  - 7
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1964-016-9/
DO  - 10.4153/CMB-1964-016-9
ID  - 10_4153_CMB_1964_016_9
ER  -