TY - JOUR AU - KÁTAI-URBÁN, KAMILLA AU - SZABÓ, CSABA TI - ON THE FREE SPECTRUM OF THE VARIETY GENERATED BY THE COMBINATORIAL COMPLETELY 0-SIMPLE SEMIGROUPS JO - Glasgow mathematical journal PY - 2007 SP - 93 EP - 98 VL - 49 IS - 1 UR - http://geodesic.mathdoc.fr/articles/10.1017/S0017089507003448/ DO - 10.1017/S0017089507003448 ID - 10_1017_S0017089507003448 ER -