ZIÓŁKOWSKI, W., and A. ŚLIWIŃSKI. “Application of a Vibrational Impedance Head to the Measurement of the Complex Elastic Modulus by the Driving Point Impedance Method”. Archives of Acoustics 16, no. 3-4 (December 31, 1991): 591–607. Accessed March 4, 2026. https://acoustics.ippt.gov.pl/index.php/aa/article/view/1252.