@article{Abonyi2001FuzzyModelingMultivariate, author = "Abonyi, J. and Babu\v{s}ka, R. and Szeifert, F.", title = "Fuzzy modeling with multivariate membership functions: gray-box identification and control design", journal = "{IEEE} Transactions on Systems, Man and Cybernetics, Part B: Cybernetics", volume = 31, number = 5, pages = "755--767", year = 2001}