TY - JOUR AU - Fabrici, Imrich TI - $\cal J$-classes in the direct product of two semigroups JO - Czechoslovak Mathematical Journal PY - 1994 SP - 325 EP - 335 VL - 44 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1994.128467/ DO - 10.21136/CMJ.1994.128467 LA - en ID - 10_21136_CMJ_1994_128467 ER -