%0 Journal Article
%A A. N. Maslov
%T The hierarchy of indexed languages of an arbitrary level
%J Doklady Akademii Nauk
%D 1974
%P 1013-1016
%V 217
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1974_217_5_a6/
%G ru
%F DAN_1974_217_5_a6