1.
RAVAUD R, LEMARQUAND G, LEMARQUAND V, DEPOLLIER C. Ironless Loudspeakers with Ferrofluid Seals. Arch. Acoust. [Internet]. 2008 Jan. 31 [cited 2026 Mar. 4];33(4(S):53–58. Available from: https://acoustics.ippt.gov.pl/index.php/aa/article/view/835