1. Programm zur Formalen Begriffsanalyse;Burmeister,1987
2. The study of the L-fuzzy concept lattice;Burusco;Mathware Soft Comput.,1994
3. Concept lattices associated with L-fuzzy W-contexts;Burusco;Mathware Soft Comput.,1996
4. Constructive versions of Tarski's fixed point theorems;Cousot;Pacific J. Math.,1979
5. On an implication function in many valued systems of logic;Dienes;Symbolic Logic,1949