1. Sur les opérations définies pour nombres reels;Aczél;Bull. Soc. Math. Fr.,1948
2. Characterizations of some classes of quasilinear functions with applications to triangular norms and to synthesizing judgments;Aczél;Methods Oper. Res.,1984
3. Extensionality in graded properties of fuzzy relations;Běhounek,2006
4. Fuzzy Relational Systems: Foundations and Principles;Bělohlávek,2002
5. Some properties concerning the quasi-inverse of a t-norm;Boixader;Mathw. Soft Comput.,1998