Stauskis, Vytautas. “The Sound Absorption of an Isolated Resonator With a Cross-Shaped Slit and Its Dependence on the Number of Resonators”. Journal of Civil Engineering and Management 2, no. 6 (June 30, 1996): 50-58. Accessed April 25, 2024. https://journals.vilniustech.lt/index.php/JCEM/article/view/9540.