%0 Journal Article
%A Kelley, R.L.
%A Swingle, P.M.
%T Concerning minimal generating subsets of semigroups
%J Portugaliae mathematica
%D 1961
%P 231-250
%V 20
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1961__20_4_114865/
%G en
%F PORMA_1961__20_4_114865