%0 Journal Article
%A Ngoc, N. V.
%T The problems of complexity of almost context-free languages [Abstract of thesis]
%J Commentationes Mathematicae Universitatis Carolinae
%D 1989
%V 30
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/CMUC_1989__30_1_a37/
%G en
%F CMUC_1989__30_1_a37