RANACHOWSKI, Przemysław; REJMUND, Feliks; PAWEŁEK, Andrzej; PIĄTKOWSKI, Andrzej. Acoustic-mechanical and microscopic investigation of corundum material. Archives of Acoustics, [S. l.], v. 32, n. 4, p. 963–969, 2014. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/696. Acesso em: 13 jan. 2025.