Manfred Broy. A Functional Calculus for Specification and Verification of Nondeterministic Interactive Systems. In Nachum Dershowitz, editor, Verification: Theory and Practice, Essays Dedicated to Zohar Manna on the Occasion of His 64th Birthday. Volume 2772 of Lecture Notes in Computer Science, pages 161-181, Springer, 2003. [doi]
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