TY - JOUR AU - Yacoub, K. R. TI - A note on semi-special permutations JO - Glasgow mathematical journal PY - 1958 SP - 164 EP - 169 VL - 2 IS - 4 UR - http://geodesic.mathdoc.fr/articles/10.1017/S2040618500033657/ DO - 10.1017/S2040618500033657 ID - 10_1017_S2040618500033657 ER -