SKUMIEL, A.; ŁABOWSKI, M. The propagation ofultrasonic waves in condenser oil at presence of DC electric field. Archives of Acoustics, [S. l.], v. 20, n. 4, p. 387–400, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/1278. Acesso em: 13 jan. 2025.