%0 Journal Article
%A Albert, J.
%T A note on the undecidability of contextfreeness
%J RAIRO. Informatique théorique
%D 1982
%P 3-11
%V 16
%N 1
%I EDP-Sciences
%U http://archive.numdam.org/item/ITA_1982__16_1_3_0/
%G en
%F ITA_1982__16_1_3_0