1. Abstract and Concrete Categories;Adámek,1990
2. Road systems and betweenness;Bankston;Bull. Math. Sci.,2013
3. On the compatibility of a ternary relation with a binary fuzzy relation;Barkat;Int. J. Uncertain. Fuzziness Knowl.-Based Syst.,2019
4. Fuzzy Relational Systems, Foundations and Principles;Bělohlávek,2002
5. Lattice Theory;Birkhoff,1973