TY - JOUR AU - Yacoub, K. R. TI - A Note on the Classes of Non-Linear Semi-Special Permutations JO - Glasgow mathematical journal PY - 1958 SP - 3 EP - 6 VL - 4 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S2040618500033761/ DO - 10.1017/S2040618500033761 ID - 10_1017_S2040618500033761 ER -