Ricardo J. G. B. Campello, Wagner C. Amaral. Hierarchical fuzzy relational models: linguistic interpretation and universal approximation. In Proceedings of the 2002 IEEE International Conference on Fuzzy Systems, FUZZ-IEEE'02, Honolulu, Hawaii, USA, May 12 - 17, 2002. pages 162-167, IEEE, 2002. [doi]
Abstract is missing.