On the degree of complexity of sentential logics, III. An example of Johansson's minimal logic Jacek Hawranek OriginalPaper Pages: 283 - 289
On Bellert's proposal concerning quantificational universals Zygmunt Vetulani OriginalPaper Pages: 311 - 320
Variations on the Ramsey test: More triviality results Peter Gärdenfors OriginalPaper Pages: 321 - 327
No non-trivial quasivariety of BCK-algebras has decidable first order theory Marek Pałasiński OriginalPaper Pages: 343 - 345
A weak intuitionistic propositional logic with purely constructive implication Mitsuhiro Okada OriginalPaper Pages: 371 - 382
Modal operators with probabilistic interpretations, I M. Fattorosi-BarnabaG. Amati OriginalPaper Pages: 383 - 393
