Language Representations Starting from Fully Initial Languages. - Gheorghe Paun; Sorina Vicolov (Acta Cybern., 1991)

A Note on Fully Initial Grammars. - Sorina Vicolov (Acta Cybern., 1991)

Further remarks on reduced languages. - Gheorghe Paun; Miklos Szijarto; Sorina Vicolov (Fundam. Informaticae, 1992)

Grammars, Grammar Systems, and GSM Mappings with Valences. - Sorina Vicolov-Dumitrescu (Mathematical Aspects of Natural and Formal Languages, 1994)

On the Generative Capacity of Certain Classes of Cooperating Grammar Systems. - Jürgen Dassow; Gheorghe Paun; Sorina Vicolov (Fundam. Informaticae, 1995)