TY  - JOUR
AU  - Erdös, P.
AU  - Rényi, A.
TI  - Remarks on a Problem of Obreanu
JO  - Canadian mathematical bulletin
PY  - 1963
SP  - 267
EP  - 273
VL  - 6
IS  - 2
UR  - http://geodesic.mathdoc.fr/articles/10.4153/CMB-1963-024-5/
DO  - 10.4153/CMB-1963-024-5
ID  - 10_4153_CMB_1963_024_5
ER  -