Bezerra, M.I.S., Y. Iano, and M.H. Tarumoto. 2008. “Evaluating Some Yule-Walker Methods With the Maximum-Likelihood Estimator for the Spectral ARMA Model”. Trends in Computational and Applied Mathematics 9 (2):175-84. https://doi.org/10.5540/tema.2008.09.02.0175.