%0 Journal Article
%A Čulík, Karel
%T On some transformations in context-free grammars and languages
%J Czechoslovak Mathematical Journal
%D 1967
%P 278-311
%V 17
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1967.100776/
%R 10.21136/CMJ.1967.100776
%G en
%F 10_21136_CMJ_1967_100776