TY - JOUR AU - Drewniak, Józef AU - Dudziak, Urszula TI - Preservation of properties of fuzzy relations during aggregation processes JO - Kybernetika PY - 2007 SP - 115 EP - 132 VL - 43 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/KYB_2007__43_2_a1/ LA - en ID - KYB_2007__43_2_a1 ER -