1. Alsina, C., Trillas, E., Pradera, A.: On a class of fuzzy set theories. In: Proceedings FUZZ-IEEE, pp. 1–5 (2007)
2. Aristotle, Metaphysics, (I 1, 980 a 21), written 350 B.C., transl. by W. D. Ross. http://classics.mit.edu/Aristotle/metaphysics.1.i.html
3. Bellman, R.E., Kalaba, R., Zadeh, L.A.: Abstraction and pattern classification, Memo RM-4307-PR, Santa Monica, CA, The RAND Corporation, Oct. 1964. Later in: J. Math. Anal. Appl. 13, 1–7 (1996)
4. Birkhoff, G.: Lattice Theory. AMS Pubs, Providence (1967)
5. Bodiou, G.: Théorie dialectique des probabilités (englobant leurs calculs classique et quantique). Gauthier-Villars, Paris (1965)