%0 Journal Article
%A N. Hindman
%A D. Strauss
%T Nearly prime subsemigroups of  ßN.
%J Semigroup forum
%D 1995
%P 299-318
%V 51
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SF_1995__51_1_135418/
%F SF_1995__51_1_135418