TY - JOUR AU - Turunen, E. TI - On generalized fuzzy relation equations: necessary and sufficient conditions for the existence of solutions JO - Acta Universitatis Carolinae. Mathematica et Physica PY - 1987 SP - 33 EP - 37 VL - 28 IS - 1 PB - mathdoc UR - https://geodesic-test.mathdoc.fr/item/AUCMP_1987__28_1_a5/ LA - en ID - AUCMP_1987__28_1_a5 ER -