TY  - JOUR
TI  - Problems for Solution
JO  - Canadian mathematical bulletin
PY  - 1972
SP  - 454
EP  - 460
VL  - 15
IS  - 3
UR  - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500031465/
DO  - 10.1017/S0008439500031465
ID  - 10_1017_S0008439500031465
ER  -