SZEKERES, András. THE SECOND SOUND PHENOMENON: PRO AND CONTRA. Periodica Polytechnica Mechanical Engineering, [S. l.], v. 48, n. 1, p. 83–87, 2004. Disponível em: https://pp5.omikk.bme.hu/me/article/view/1359. Acesso em: 5 feb. 2025.