Furio Honsell, Marina Lenisa. Unfixing the Fixpoint: The Theories of the λY-Calculus. In Bob Coecke, Luke Ong, Prakash Panangaden, editors, Computation, Logic, Games, and Quantum Foundations. The Many Facets of Samson Abramsky - Essays Dedicated to Samson Abramsky on the Occasion of His 60th Birthday. Volume 7860 of Lecture Notes in Computer Science, pages 150-165, Springer, 2013. [doi]
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