%0 Journal Article
%A Pondělíček, Bedřich
%T On tolerances on periodic semigroups
%J Czechoslovak Mathematical Journal
%D 1978
%P 647-649
%V 28
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1978.101565/
%R 10.21136/CMJ.1978.101565
%G en
%F 10_21136_CMJ_1978_101565