TY  - JOUR
AU  - Ngoc, N. V.
TI  - The problems of complexity of almost context-free languages [Abstract of thesis]
JO  - Commentationes Mathematicae Universitatis Carolinae
PY  - 1989
VL  - 30
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/CMUC_1989__30_1_a37/
LA  - en
ID  - CMUC_1989__30_1_a37
ER  -