%0 Journal Article
%A Geffert, Viliam
%T Normal forms for phrase-structure grammars
%J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
%D 1991
%P 473-496
%V 25
%N 5
%I EDP-Sciences
%U http://archive.numdam.org/item/ITA_1991__25_5_473_0/
%G en
%F ITA_1991__25_5_473_0