SNAKOWSKA, A., and R. WYRZYKOWSKI. “Impedance of the Semi-Infinite Unraffled Cylindrical Wave-Guide Outlet”. Archives of Acoustics 13, no. 1-2 (July 10, 2015): 137–145. Accessed August 3, 2025. https://acoustics.ippt.pan.pl/index.php/aa/article/view/3066.