1. Can fuzzy neural nets approximate continuous fuzzy functions?;Buckley;Fuzzy Sets and Systems,1994
2. Approximation by superpositions of a sigmoidal function;Cybenko;Math. Control, Signals & Systems,1989
3. Metric Spaces of Fuzzy Sets: Theory and Applications;Diamond,1994
4. Fuzzy Sets and Systems: Theory and Applications;Dubois,1980
5. Fuzzy Neuronale Netze: Von kooperativen über hybride zu fusionierten vage konnektionistischen Systemen;Feuring,1995