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http://cs.famaf.unc.edu.ar/ leorodriguez/compilercorrectness/
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http://coq.inria.fr/
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4. Abramsky, S., Ong, C.L.: Full abstraction in the lazy lambda calculus. Inf. Comput. 105(2), 159–267 (1993)
5. Benton, N., Kennedy, A., Varming, C.: Formalizing Domains, Ultrametric Spaces and Semantics of Programming Languages (2010), unpublished