%0 Journal Article
%A Timo Lepistö
%T On commutative languages
%J Annales Fennici Mathematici
%D 1971
%V 471-500
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.5186/aasfm.1971.486/
%R 10.5186/aasfm.1971.486
%G en
%F AFM_1971_471-500_a14