TY  - JOUR
AU  - Parchmann, R.
AU  - Duske, J.
TI  - The structure of index sets and reduced indexed grammars
JO  - RAIRO. Informatique théorique et applications
PY  - 1990
SP  - 89
EP  - 104
VL  - 24
IS  - 1
PB  - EDP-Sciences
UR  - https://www.numdam.org/item/ITA_1990__24_1_89_0/
LA  - en
ID  - ITA_1990__24_1_89_0
ER  -