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  1. August Pieczkowski (1975). Causal Implications of Jaśkowski. Studia Logica 34 (2):169 - 185.
    Part 1 describes Stanisaw Jakowski's concept of defining some often used con ditionals, namely, factorial, ewfficient and definitive implications.Part 2 contains the results strictly connected with the theory of the above implications.
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  2. August Pieczkowski (1974). Über Theorien Im Erweiterten Sinne. Studia Logica 33 (4):317 - 331.
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  3. August Pieczkowski (1974). User Dem Hegriff der Theorie. Bulletin of the Section of Logic 3 (1):25-28.
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  4. August Pieczkowski (1971). On the Definitive Implication. Studia Logica 27 (1):101 - 116.
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  5. Jerzy Kotas & August Pieczkowski (1970). Allgemeine Logische und Mathematische Theorien. Mathematical Logic Quarterly 16 (6):353-376.
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  6. August Pieczkowski (1968). The Efficient Implication. Studia Logica 23 (1):7 - 23.
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  7. August Pieczkowski (1968). Uwagi O Pracy J.-L. Gardies “les Deux Tétraèdres Des Liaisons Logiques Interpropositionnelles Bivalentes”. Studia Logica 23 (1):163 - 164.
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  8. August Pieczkowski (1968). Undecidability of the Homogeneous Formulas of Degree 3 of the Predicate Calculus. Studia Logica 22 (1):7 - 16.
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  9. Jerzy Kotas & August Pieczkowski (1967). A Cylindrical Algebra Based on the Boolean Ring. Studia Logica 21 (1):71 - 80.
  10. Jerzy Kotas & August Pieczkowski (1967). Scientific Works of Stanisław Jaśkowski. Studia Logica 21 (1):7 - 15.
  11. Jerzy Kotas & August Pieczkowski (1966). On a Generalized Cylindrical Algebra and Intuitionistic Logic. Studia Logica 18 (1):73 - 81.
  12. August Pieczkowski (1966). The Axiomatic System of the Factorial Implication. Studia Logica 18 (1):41 - 64.
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