AKOPYAN, Valentin. Thresholds of biological action of ultrasound. Archives of Acoustics, [S. l.], v. 9, n. 1-2, p. 35–40, 2015. Disponível em: https://acoustics3.ippt.pan.pl/index.php/aa/article/view/3185. Acesso em: 29 apr. 2025.