SPADERA, M. C. Oscillazioni libere del Mare del Nord. Annals of Geophysics, [S. l.], v. 11, n. 2, p. 139–140, 1958. DOI: 10.4401/ag-5747. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5747. Acesso em: 24 apr. 2024.