Production Complexity of Some Operations on Context-Free Languages. - Jürgen Dassow; Ronny Harbich (DCFS, 2012)

A Comparison of the Descriptional Complexity of Classes of Limited Lindenmayer Systems: Part I. - Ronny Harbich; Bianca Truthe (Int. J. Found. Comput. Sci., 2012)

Descriptional Complexity of Union and Star on Context-Free Languages. - Jürgen Dassow; Ronny Harbich (J. Autom. Lang. Comb., 2012)

A Comparison of the Descriptional Complexity of Classes of Limited Lindenmayer Systems. - Ronny Harbich; Bianca Truthe (J. Autom. Lang. Comb., 2012)

Regel- und Symbolkomplexität kontextfreier Sprachen unter ausgewählten Operationen. - Ronny Harbich (2020)