%0 Journal Article
%A H. Cohen
%A R.J. Koch
%T Idempotent semigroups generated by threads, I.
%J Semigroup forum
%D 1981
%P 247-254
%V 23
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1981__23_134517/
%F SF_1981__23_134517