%0 Journal Article
%A Yoshihiro Nakamura
%A Nobuhisa Sakakibara
%T Perfectness of certain subsemigroups of a perfect semigroup.
%J Mathematische Annalen
%D 1990
%P 213-220
%V 287
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAN_1990__287_1_164680/
%F MAN_1990__287_1_164680