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3. Process algebra for synchronous communication;Bergstra;Inf. Comput.,1984
4. A theory of communicating sequential processes;Brookes;J. ACM,1984
5. LOTOS – A Formal Description Technique Based on the Temporal Ordering of Observational Behaviour, International Standard 8807, International Organization for Standardization – Information Processing Systems – Open Systems Interconnection, Geneva;ISO/IEC,1989