1. Abstract and Concrete Categories;Adámek,1990
2. G. Birkhoff, Lattice theory, American Mathematical Society Colloquium Publications, third ed., American Mathematical Society, RI, 1967.
3. Algebraic Theory of Lattices;Crawley,1973
4. Some remarks on fuzzy powerset operators;De Mitri;Fuzzy Sets and Systems,2002
5. A Compendium of Continuous Lattices;Gierz,1980