1. S. Becker, R.H. Reussner, and V. Firus. Specifying Contractual Use, Protocols and Quality Attributes for Software Components. In Proc. of 1st Int'l Workshop on Component Engineering and Methodology, pages 13–22, 2003
2. M.A. Bednarczyk. Categories of Asynchronous Systems. PhD thesis, University of Sussex, 1988
3. Algebraic Specification of Reactive Systems;Broy;Theoretical Computer Science,2000
4. LCSs: Breathing Life into Message Sequence Charts;Damm;Formal Methods in System Design,2001
5. Introduction to Lattices and Order;Davey,1990