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  1.  15
    Zbigniew Stachniak (1998). On Finitely-Valued Inference Systems. Studia Logica 61 (1):149-169.
    A proof-theoretical analysis of finite-valuedness in the domain of cumulative inference systems is presented.
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  2. Zbigniew Stachniak (1981). Introduction to Model Theory for Leśniewski's Ontology. Wydawnictwo Uniwersytetu Wrocłaskiego.
  3. Jan Srzednicki & Zbigniew Stachniak (eds.) (1988). S. Le'sniewski's Lecture Notes in Logic. Kluwer Academic Publishers.
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  4.  4
    Zbigniew Stachniak (1985). Note on Structural Logics. Zeitschrift fur mathematische Logik und Grundlagen der Mathematik 31 (19-20):317-320.
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  5.  11
    Zbigniew Stachniak (1988). Note on Generalized Matrix Semantics and the Problem of Supremum. Bulletin of the Section of Logic 17 (2):82-86.
    In [7] Wojtylak showed that the supremum of a finite collection of strongly finite logics is not necessarily strongly finite, putting to an end the dispute concerning the underlying algebraic structure of the set of all strongly finite logics defined on a propositional language. In this paper we prove that Wojtylak’s result extends to a wider class of propositional logics defined by finite sets of finite matrices with admissible valuations.
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  6.  7
    Zbigniew Stachniak (1985). Note on Structural Logics. Mathematical Logic Quarterly 31 (19‐20):317-320.
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  7.  8
    Jan Srzednicki & Zbigniew Stachniak (eds.) (1998). Le'sniewski's Systems. Protothetic. Kluwer Academic Publishers.
    The volume collects many of the most significant commentaries on, and contributions to, Protothetic. A Protothetic Bibliography is included.
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  8.  10
    Zbigniew Stachniak (1993). An Essay on Resolution Logics. Studia Logica 52 (2):309 - 322.
    This paper discusses the resolution principle in the context of non-classical logics.
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  9.  14
    Zbigniew Stachniak (1995). Nonmonotonic Theories and Their Axiomatic Varieties. Journal of Logic, Language and Information 4 (4):317-334.
    The properties of monotonic inference systems and the properties of their theories are strongly linked. These links, however, are much weaker in nonmonotonic inference systems. In this paper we introduce the notion of anaxiomatic variety for a theory and show how this notion, instead of the notion of a theory, can be used for the syntactic and semantic analysis of nonmonotonic inferences.
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  10.  11
    Zbigniew Stachniak (1989). Many-Valued Computational Logics. Journal of Philosophical Logic 18 (3):257 - 274.
  11. Jan T. J. Srzednicki & Zbigniew Stachniak (2001). Leśniewski's Systems. Protothetic. Studia Logica 68 (3):401-404.
     
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  12. Zbigniew Stachniak (1978). Some Notes On Characteristic Consequence Operations. Bulletin of the Section of Logic 7 (4):159-164.
     
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