%0 Journal Article %A Diekert, Volker %A Möbus, Axel %T Hotz-isomorphism theorems in formal language theory %J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications %D 1989 %P 29-43 %V 23 %N 1 %I EDP-Sciences %U http://www.numdam.org/item/ITA_1989__23_1_29_0/ %G en %F ITA_1989__23_1_29_0