| 1. Ryszard WOJCICKI, An axiomatic treatment of non-monotonic arguments | 56 [PDF 2006] |
| 2. Ivan KRAMOSIL, Evaluation of propositional formulas from the viewpoint of computational complexity | 62 [PDF 2006] |
| 3. Katarzyna HALKOWSKA, On dispersion operator on classes of algebras | 67 [PDF 2006] |
| 4. Andrzej ZBRZEZNY, The Gentzen type axiomatization of some three-valued propositional logic | 70 [PDF 2006] |
| 5. Richard J.THOMPSON, Noncummulative cylindric algebras and relativizations of cylindric algebras | 75 [PDF 2006] |
| 6. Zbigniew STACHNIAK, Note on generalized matrix semantics and the problem of supremum | 82 [PDF 2006] |