VRONSKII, B. M. On small motions of a “liquid-gas” system in a bounded domain. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 58, n. 10, p. 1326–1334, 2006. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3535. Acesso em: 6 dec. 2025.