TY - JOUR AU - Ježek, Jaroslav TI - Some decidable congruences of free monoids JO - Czechoslovak Mathematical Journal PY - 1999 SP - 475 EP - 480 VL - 49 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/CMJ_1999__49_3_a1/ LA - en ID - CMJ_1999__49_3_a1 ER -