%0 Article %A Deák Attila %D 2006 %G English %B Acta scientiarum mathematicarum %@ 0001-6969 %T On a problem of A. Nagy concerning permutable semigroups satisfying a non-trivial permutation identity %U http://acta.bibl.u-szeged.hu/16154/1/math_072_numb_003_004_537-541.pdf