Z. CEROWSKI, A. OPILSKI, T. PUSTELNY, and M. URBAŃCZYK, “On an approximate method for calculating filters based on acoustic surface waves”, Arch. Acoust., vol. 1, no. 1, pp. 33–41, Mar. 2016, Accessed: Apr. 26, 2025. [Online]. Available: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3501