%0 Journal Article
%A V. A. Iliushkin
%T On complexity of the grammatical description of contextually free languages
%J Doklady Akademii Nauk
%D 1972
%P 1244-1245
%V 203
%N 6
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1972_203_6_a4/
%G ru
%F DAN_1972_203_6_a4