Machado, Jeremias B., Campello, Ricardo, and Amaral, Wagner C. (2013) Takagi–Sugeno fuzzy models in the framework of orthonormal basis functions. IEEE Transactions on Cybernetics, 43 (3). pp. 858-870.

da Rosa, Alex, Campello, Ricardo J.G.B., Ferreira, Paulo A.V., Oliveira, Gustavo H.C., and Amaral, Wagner C. (2010) Robust expansion of uncertain volterra kernels into orthonormal series. In: Proceedings of the 2010 American Control Conference. pp. 5465-5470. From: AAC 2010: American Control Conference, 30 June - 2 July 2010, Baltimore, MD, USA.

da Rosa, Alex, Campello, Ricardo J.G.B., and Amaral, Wagner C. (2009) Exact search directions for optimization of linear and nonlinear models based on generalized orthonormal functions. IEEE Transactions on Automatic Control, 54 (12). pp. 2757-2772.

Da Rosa, Alex, Campello, Ricardo J.G.B., and Amaral, Wagner C. (2008) An optimal expansion of Volterra models using independent Kautz bases for each kernel dimension. International Journal of Control, 81 (6). pp. 962-975.

Meleiro, L.A.C., Campello, R.J.G.B., Filho, R. Maciel, and Amaral, W.C. (2006) Application of hierarchical neural fuzzy models to modeling and control of a bioprocess. Applied Artificial Intelligence, 20 (9). pp. 797-816.

Medieros, Anderson V., Amaral, Wagner C., and Campello, Ricardo J.G.B. (2006) GA optimization of OBF TS fuzzy models with linear and non linear local models. In: Proceedings of the Ninth Brazilian Symposium on Neural Networks. pp. 66-71. From: SBRN06: Ninth Brazilian Symposium on Neural Networks, 23-27 October 2006, Ribeirão Preto, Brazil.

Campello, Ricardo, and Amaral, Wagner Caradori do (2006) Hierarchical fuzzy relational models: linguistic interpretation and universal approximation. IEEE Transactions on Fuzzy Systems, 14 (3). pp. 446-453.

Campello, Ricardo J.G.B., do Amaral, Wagner C., and Favier, Gérard (2006) A note on the optimal expansion of Volterra models using Laguerre functions. Automatica, 42 (4). pp. 689-693.

Campello, R.J.G.B., Von Zuben, F.J., Amaral, W.C., Meleiro, L.A.C., and Maciel Filho, R. (2003) Hierarchical fuzzy models within the framework of orthonormal basis functions and their application to bioprocess control. Chemical Engineering Science, 58 (18). pp. 4259-4270.

Campello, Ricardo J.G.B., Favier, Gérard, and Amaral, Wagner C. (2003) Optimal expansions of discrete-time Volterra models using Laguerre functions. In: Proceedings of the 13th IFAC Symposium on System Identification. pp. 1844-1849. From: SYSID 2003: 13th IFAC Symposium on System Identification, 27-29 August 2003, Rotterdam, The Netherlands.

Campello, R.J.G.B., and Amaral, W.C. (2003) Towards true linguistic modelling through optimal numerical solutions. International Journal of Systems Science, 34 (2). pp. 139-157.

Campello, R.J.G.B., and Amaral, W.C. (2002) Hierarchical fuzzy relational models: linguistic interpretation and universal approximation. In: IEEE International Conference on Fuzzy Systems. pp. 162-167. From: FUZZ-IEEE 02: International Conference on Fuzzy Systems, 12-17 may 2002, Honolulu, HI, USA.

Campello, R.J.G.B., and Amaral, W.C. (2001) Modeling and linguistic knowledge extraction from systems using fuzzy relational models. Fuzzy Sets and Systems, 121 (1). pp. 113-126.

Meleiro, L.A.C., Filho, R. Maciel, Campello, R.J.D.B., and Amaral, W.C. (2001) Hierarchical neural fuzzy models as a tool for process identification: a bioprocess application. In: Majutaba, I.M., and Hussain, M.A., (eds.) Application of Neural Networks and Other Learning Technologies in Process Engineering. Imperial College Press, London, UK, pp. 173-196.

Campello, Ricardo José G.B., and Amaral, Wagner C. (1999) A relational approach for complex system identification. Controle & Automação, 10 (3). pp. 139-148.