TY  - JOUR
TI  - Openings in Mathematics
JO  - Canadian mathematical bulletin
PY  - 1968
SP  - 653
EP  - 654
VL  - 11
IS  - 4
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500029878/
DO  - 10.1017/S0008439500029878
ID  - 10_1017_S0008439500029878
ER  -