| 1. Richard ROUTLEY, How disjunctive syllogism can be seen as a fallacy of relevance | 144 [PDF 2009] |
| 2. Pawel M.IDZIAK, A minimal equational base for certain varieties of BCK-algebras | 152 [PDF 2009] |
| 3. Janis CIRULIS, On the EA-fragment of classical propositional logic | 158 [PDF 2009] |
| 4. Zdzislaw DYWAN, The necessity of modal logic S5 is metalogical | 162 [PDF 2009] |
| 5. Wieslaw DZIOBIAK, Non-existence of a countable strongly adequate matrix semantics for neighbours of E | 170 [PDF 2009] |
| 6. Wieslaw DZIOBIAK, Concerning axiomatizability of the quasivariety generated by a finite Heyting or topological Boolean algebra | 177 [PDF 2009] |
| 7. George EPSTEIN and Alfred HORN, A summary of "Core Points in Double Heyting Algebras and Dissectable Lattices" | 181 [PDF 2009] |
| 8. Newton C.A. da COSTA and Elias H.ALVES, Relations between paraconsistent logic and many-valued logic | 185 [PDF 2009] |