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2. Complex-curve fitting
3. Transfer function synthesis as a ratio of two complex polynomials
4. Vinagre, B. , 2001, “Modelado y Control de Sistemas Dinámicos Caracterizados por Ecuaciones Íntegro-Diferenciales de Orden Fraccional,” Ph.D. thesis, Universidad Nacional de Educación a Distancia, Madrid.
5. Valério, D., and Sá da Costa, J. , 2005, “Levy’s Identification Method Extended to Commensurate Fractional Order Transfer Functions,”Fifth EUROMECH Nonlinear Dynamics Conference, EUROMECH, pp. 1357–1366.