SNAKOWSKA, A. and WYRZYKOWSKI, R. (1988) “Impedance of the semi-infinite unraffled cylindrical wave-guide outlet”, Archives of Acoustics, 13(1-2), pp. 137–145. Available at: http://acoustics.ippt.gov.pl/index.php/aa/article/view/3066 (Accessed: 18 April 2026).