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2. A filter λ-model and the completeness of type assignment;Barendregt;J. Symbolic Logic,1983
3. Schema di tipo principale per la disciplina dei tipi con intersezione;Berta,1987
4. An extension of the basic functionality theory for the λ-calculus;Coppo;Notre Dame J. Formal Logic,1980
5. Principal type scheme and λ-calculus semantics;Coppo,1980