TY  - JOUR
TI  - Openings in Mathematics
JO  - Canadian mathematical bulletin
PY  - 1963
SP  - 158
EP  - 158
VL  - 6
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500026503/
DO  - 10.1017/S0008439500026503
ID  - 10_1017_S0008439500026503
ER  -