scientific article; zbMATH DE number 3336771
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Publication:5613907
zbMath0212.31204MaRDI QIDQ5613907
Publication date: 1970
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Related Items (2)
Realizability and finite validity of propositional formulas with restrictions on the occurrence of implication ⋮ The occurrence of an implication in finitely valid, intuitively unprovable formulas of propositional logic
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