Zawieska, W.M., and W.P. Rdzanek. “Low Frequency Approximation of Mutual Modal Radiation Efficiency of a Vibrating Rectangular Plate”. Archives of Acoustics 31, no. 4(S) (January 31, 2006): 123–130. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/1332.