%0 Journal Article
%A Dassow, Jürgen
%A Mitrana, Victor
%A Păun, Gheorghe
%A Stiebe, Ralf
%T On differentiation functions, structure functions, and related languages of context-free grammars
%J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
%D 2004
%P 257-267
%V 38
%N 3
%I EDP-Sciences
%U http://www.numdam.org/articles/10.1051/ita:2004013/
%R 10.1051/ita:2004013
%G en
%F ITA_2004__38_3_257_0