%0 Journal Article
%A I. I. Parovichenko
%T Algebraic systems containing semigroups of ultrafilter type
%J Doklady Akademii Nauk
%D 1983
%P 304-307
%V 272
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1983_272_2_a11/
%G ru
%F DAN_1983_272_2_a11