A partially ordered extention of the integers George EpsteinHelena Rasiowa OriginalPaper Pages: 303 - 332
Natural dualities for varieties ofn-valued łukasiewicz algebras H. A. Priestley OriginalPaper Pages: 333 - 370
A complete minimal logic of the propositional contents of thought Marek NowakDaniel Vanderveken OriginalPaper Pages: 391 - 410