1. C. André: Use of the Behaviour Equivalence in Place-Transition Net Analysis, in: Application and Theory of Petri Nets, IFB 52, Springer, 1982
2. B. Baumgarten: Über interne und externe Charakterisierungen des Verhaltens von PT-Netz-Bausteinen, Arbeitspapiere der GMD, Nr. 185, 1985
3. B. Baumgarten, P. Ochsenschläger, R. Prinoth: Building Blocks for Distributed Systems Design, in: Protocol Specification, Testing and Verification V, North-Holland, 1986
4. B. Baumgarten, H. J. Burkhardt, P. Ochsenschläger, R. Prinoth: The Signing of a Contract — a Tree-Structured Application Modelled with Petri Net Building Blocks, in: Advances in Petri Nets 1985, LNCS 222, Springer, 1986, (long version in: Arbeitspapiere der GMD, Nr.161, 1985)
5. B. Baumgarten, P. Ochsenschläger, R. Prinoth: A Formal Model of the CCR Algorithm, Arbeitspapiere der GMD, Nr.186, 1985