TY - JOUR TI - Problems for Solution JO - Canadian mathematical bulletin PY - 1961 SP - 187 EP - 187 VL - 4 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500025753/ DO - 10.1017/S0008439500025753 ID - 10_1017_S0008439500025753 ER -