1. Aho, A.V., Hopcroft, J.E., Ullman, J.D.: The Design and Analysis of Computer Algorithms. Addison-Wesley Publishing Co, Reading (1974)
2. Bednarczyk, M.: Hereditary history preserving bisimulation or what is the power of the future perfect in program logics. Technical report, Polish Academy of Sciences, Gdansk (1991)
3. Christensen, S.: Decidability and Decomposition in process algebras. PhD thesis, Dept. of Computer Science, University of Edinburgh, UK (1993)
4. Lecture Notes in Computer Science;J. Esparza,1995
5. Fröschle, S.: Decidability of plain and hereditary history-preserving bisimulation for BPP. In: Proc. EXPRESS 1999. ENTCS, vol. 27 (1999)