%0 Journal Article
%A Z. Hedrlín
%T Commutative systems as generalized semigroups
%J Doklady Akademii Nauk
%D 1965
%P 483-486
%V 164
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1965_164_3_a1/
%G ru
%F DAN_1965_164_3_a1