1. R. Bardohl. Concept and Implementation of the Language GVT for the Graphical Visualisation of Terms of Algebraic Specifications (in german). Master's thesis, Technische Universität Berlin, 1993.
2. I. Claßen. Compositionality of Application Oriented Structuring Mechanisms for Algebraic Specification Languages with Initial Semantics. PhD thesis, Technische Universität Berlin, 1993.
3. I. Claßen, H. Ehrig, and D. Wolz. Algberaic Specification Techniques and Tools for Software Development — The ACT Approach. AMAST Series in Computing Vol. 1. World Scientific, 1993.
4. H. Ehrig and B. Mahr. Fundamentals of Algebraic Specification 1: Equations and Initial Semantics, volume 6 of EATCS Monographs on Theoretical Computer Science. Springer, Berlin, 1985.
5. R. Geisler and M. Klar. Design and Realisation of the Interactive Theorem-and Completeness Prover InterACT for Algebraic Specifications (in german). Master's thesis, Technische Universität Berlin, June 1995.