Codes, languages and MOL schemes H. J. Shyr; G. Thierrin — 1977 RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
Disjunctive languages and compatible orders M. Ito; H. J. Shyr; G. Thierrin — 1989 RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications