Luz, Maksym, and Mikhail Moklyachuk. “Robust Filtering of Sequences With Periodically Stationary Multiplicative Seasonal Increments”. Statistics, Optimization & Information Computing 9, no. 4 (July 30, 2021): 1010-1030. Accessed May 21, 2022. http://iapress.org/index.php/soic/article/view/1197.