TY - JOUR TI - Solutions JO - Canadian mathematical bulletin PY - 1967 SP - 606 EP - 610 VL - 10 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0008439500028459/ DO - 10.1017/S0008439500028459 ID - 10_1017_S0008439500028459 ER -