TY - JOUR TI - Solutions JO - Canadian mathematical bulletin PY - 1961 SP - 187 EP - 194 VL - 4 IS - 2 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500025765/ DO - 10.1017/S0008439500025765 ID - 10_1017_S0008439500025765 ER -