%0 Journal Article
%A Kopeček, Oldřich
%A Novotný, Miroslav
%T On some invariants of unary algebras
%J Czechoslovak Mathematical Journal
%D 1974
%P 219-246
%V 24
%N 2
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1974.101234/
%R 10.21136/CMJ.1974.101234
%G en
%F 10_21136_CMJ_1974_101234