%0 Journal Article
%A A. Nagy
%T Permutation functions and (n,m)-commutativity of semigroups .
%J Semigroup forum
%D 1994
%P 71-78
%V 48
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1994__48_3_135298/
%F SF_1994__48_3_135298