%0 Journal Article
%A Zelinka, Bohdan
%T Tolerance relations on periodic commutative semigroups
%J Czechoslovak Mathematical Journal
%D 1977
%P 167-169
%V 27
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1977.101454/
%R 10.21136/CMJ.1977.101454
%G en
%F 10_21136_CMJ_1977_101454