TY - JOUR AU - Zanten, A. J. van AU - Vries, E. de TI - On The Number of Classes of a Finite Group Invariant for Certain Substitutions JO - Canadian journal of mathematics PY - 1974 SP - 1090 EP - 1097 VL - 26 IS - 5 UR - http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-101-6/ DO - 10.4153/CJM-1974-101-6 ID - 10_4153_CJM_1974_101_6 ER -