1. L. Ljung, System Identification: Theory for the User, 2nd edn. (Prentice-Hall, Englewood Cliffs, NJ, 1999)
2. T. Chen, L. Ljung, Regularized system identification using orthonormal basis functions. European Control Conference, ECC 2015, 1291–1296 (2015). https://doi.org/10.1109/ECC.2015.7330716
3. P. Heuberger, P. Van Den Hof, B. Wahlberg, Modelling and identification with rational orthogonal basis functions, in Modelling and Identification with Rational Orthogonal Basis Functions (2005), pp. 1–397. https://doi.org/10.1007/1-84628-178-4
4. G. Pillonetto, G. De Nicolao, A new kernel-based approach for linear system identification. Automatica 46(1), 81–93 (2010). https://doi.org/10.1016/j.automatica.2009.10.031
5. J.S. Bendat, A.G. Piersol, Engineering Applications of Correlation and Spectral Analysis (Wiley-Interscience, New York, 1980)