[1]
R. RAVAUD, G. LEMARQUAND, V. LEMARQUAND, and C. DEPOLLIER, “Ironless Loudspeakers with Ferrofluid Seals”, Arch. Acoust., vol. 33, no. 4(S), pp. 53–58, Dec. 2008, Accessed: Jan. 17, 2026. [Online]. Available: https://acoustics.ippt.gov.pl/index.php/aa/article/view/835