The Characterization of Nonexpansive Grammars by Rational Power Series - Gerd Baron; Werner Kuich (Inf. Control., 1981)

Factorial Languages with Quadratically Upper Bounded Growth Functions and Nonlinearly Upper Bounded Subword Complexities. - Gerd Baron; Friedrich J. Urbanek (Inf. Process. Lett., 1989)

Predecessors in Random Mappings. - Gerd Baron; Michael Drmota; Ljuben R. Mutafchiev (Comb. Probab. Comput., 1996)