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  1. (1 other version)Semantical Analysis of Modal Logic I. Normal Propositional Calculi.Saul A. Kripke - 1963 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 9 (5‐6):67-96.
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  • (3 other versions)Symbolic Logic.C. I. Lewis & C. H. Langford - 1932 - Erkenntnis 4 (1):65-66.
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  • Modal Logics Between S 4 and S 5.M. A. E. Dummett & E. J. Lemmon - 1959 - Mathematical Logic Quarterly 5 (14-24):250-264.
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  • Eine Unableitbarkeitsbeweismethode für den intuitionistischen Aussagenkalkul.G. Kreisel - 1957 - Archive for Mathematical Logic 3 (3-4):74.
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  • (1 other version)Introduction to mathematical logic, vol. I.A. Church - 1958 - Revue Philosophique de la France Et de l'Etranger 148:118-119.
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  • (1 other version)An extension algebra and the modal system ${\rm T}$.E. J. Lemmon - 1960 - Notre Dame Journal of Formal Logic 1 (1-2):3-12.
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  • (1 other version)A detailed argument for the Post-Linial theorems.Mary Katherine Yntema - 1964 - Notre Dame Journal of Formal Logic 5 (1):37-50.
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  • O pewnym fragmencie implikacyjnego rachunku zdań.Helena Rasiowa - 1955 - Studia Logica 3 (1):208 - 226.
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  • (1 other version)The Finite Model Property and Subsystems of Classical Propositional Calculus.Ronald Harrop - 1959 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 5 (1-2):29-32.
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  • (1 other version)The Finite Model Property and Subsystems of Classical Propositional Calculus.Ronald Harrop - 1959 - Mathematical Logic Quarterly 5 (1‐2):29-32.
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  • (1 other version)A note on the modal calculi S 4.2 and S 4.3.R. Bull - 1964 - Mathematical Logic Quarterly 10 (4):53-55.
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  • (1 other version)A note on the modal calculi S 4.2 and S 4.3.R. A. Bull - 1964 - Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 10 (4):53-55.
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