1. Free algebras and functional representation for fuzzy logics;Aguzzoli,2011
2. An analytic calculus for quantified propositional Gödel logic;Baaz,2000
3. Gödel–Dummett logics;Baaz,2011
4. Introduction to mathematical fuzzy logic;Běhounek,2011
5. Lattice-ordered rings;Birkhoff;Anais da Academia Brasileira de Ciências,1956