TY  - JOUR
AU  - Albert, J.
TI  - A note on the undecidability of contextfreeness
JO  - RAIRO. Informatique théorique
PY  - 1982
SP  - 3
EP  - 11
VL  - 16
IS  - 1
PB  - EDP-Sciences
UR  - http://www.numdam.org/item/ITA_1982__16_1_3_0/
LA  - en
ID  - ITA_1982__16_1_3_0
ER  -