@article{ITA_1991__25_5_473_0,
author = {Geffert, Viliam},
title = {Normal forms for phrase-structure grammars},
journal = {RAIRO - Theoretical Informatics and Applications - Informatique Th\'eorique et Applications},
volume = {25},
year = {1991},
pages = {473-496},
mrnumber = {1144010},
zbl = {0755.68092},
language = {en},
url = {http://dml.mathdoc.fr/item/ITA_1991__25_5_473_0}
}
Geffert, Viliam. Normal forms for phrase-structure grammars. RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Tome 25 (1991) pp. 473-496. http://gdmltest.u-ga.fr/item/ITA_1991__25_5_473_0/
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