Laukaitis, A. “An Empirical Study for the Estimation of Autoregressive Hilbertian Processes by Wavelet Packet Method”. Nonlinear Analysis: Modelling and Control 12, no. 1 (January 25, 2007): 65–75. Accessed May 3, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/14722.