%0 Journal Article
%A A. L. Semenov
%T Algorithmic problems for power series and context-free grammars
%J Doklady Akademii Nauk
%D 1973
%P 50-52
%V 212
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1973_212_1_a11/
%G ru
%F DAN_1973_212_1_a11