Regular Chain Code Picture Languages of Nonlinear Descriptional Complexity. - Friedhelm Hinz (MFCS, 1986)

Questions of Decidability for Context-free Chain Code Picture Languages. - Friedhelm Hinz (IMYCS, 1988)

Classes of Picture Languages that Cannot be Distinguished in the Chain Code Concept and Deletion of Redundant Retreats. - Friedhelm Hinz (STACS, 1989)

A undecidability result for regular anguages and its applications to regulated rewriting. - Friedhelm Hinz; Jürgen Dassow (Bull. EATCS, 1989)

The Membership Problem for Context-Free Chain Code Picture Languages. - Friedhelm Hinz (MFCS, 1990)

Erzeugung von Bildsprachen durch Chomsky-Grammatiken: Entscheidbarkeits- und Komplexitätsfragen. - Friedhelm Hinz (1990)

Decision Problems and Regular Chain Code Picture Languages. - Jürgen Dassow; Friedhelm Hinz (Discret. Appl. Math., 1993)