CALOI, P. Peculiari caratteristiche delle oscillazioni libere del lago di Bolsena. Annals of Geophysics, [S. l.], v. 18, n. 4, p. 295–305, 1965. DOI: 10.4401/ag-5507. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5507. Acesso em: 7 jul. 2022.