TY - JOUR TI - Problems for Solution JO - Canadian mathematical bulletin PY - 1967 SP - 604 EP - 605 VL - 10 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500028447/ DO - 10.1017/S0008439500028447 ID - 10_1017_S0008439500028447 ER -