1. Nonclassical Logics in a Relational Framework;Orlowska,1994
2. Semantics of Vague Concepts;Orlowska,1983
3. Restructuring mathematical logic: An approach based on Peirce's pragmatism;Wille,1994
4. Restructuring lattice theory: An approach based on hierarchies of concepts;Wille,1982
5. Information systems — Theoretical foundations;Pawlak;Information Systems,1983