Lin, Zhenhua, and Hongtu Zhu. “MFPCA: Multiscale Functional Principal Component Analysis”. Proceedings of the AAAI Conference on Artificial Intelligence 33, no. 01 (July 17, 2019): 4320-4327. Accessed October 5, 2022. https://ojs.aaai.org/index.php/AAAI/article/view/4341.