Each regular code is included in a maximal regular code

Ehrenfeucht, A.; Rozenberg, G.

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 20 (1986) p. 89-96

Coordinated pair systems ; part I : Dyck works and classical pumping

Ehrenfeucht, A.; Hoogeboom, H. J.; Rozenberg, G.

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 20 (1986) p. 405-424

Coordinated pair systems ; part II : sparse structure of Dyck words and Ogden's lemma

Ehrenfeucht, A.; Hoogeboom, H. J.; Rozenberg, G.

RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications, Volume 20 (1986) p. 425-439

Strong iterative pairs and the regularity of context-free languages

Ehrenfeucht, A.; Rozenberg, G.

RAIRO. Informatique théorique, Volume 19 (1985) p. 43-56

Hypergraph systems and their extensions

Janssens, D.; Rozenberg, G.

RAIRO. Informatique théorique, Volume 17 (1983) p. 163-196

On the separating power of EOL systems

Ehrenfeucht, A.; Rozenberg, G.

RAIRO. Informatique théorique, Volume 17 (1983) p. 13-22

On subword complexities of homomorphic images of languages

Ehrenfeucht, A.; Rozenberg, G.

RAIRO. Informatique théorique, Volume 16 (1982) p. 303-316

FPOL systems generating counting languages

Ehrenfeucht, A.; Rozenberg, G.

RAIRO. Informatique théorique, Volume 15 (1981) p. 161-173