1. On the Devaney’s definition of chaos;Banks;Am. Math. Monthly,1992
2. An introduction to chaotic dynamical systems;Devaney,1989
3. Theory of correspondences;Klein,1984
4. A note on the Zadeh’s extensions;Román-Flores;Fuzzy Sets Syst.,2001
5. Discrete fuzzy dynamical systems: a first approach;Román-Flores;Rev. Mat. Ing.,2001