PERNAZZA, P. Navigazione spaziale. Annals of Geophysics, [S. l.], v. 16, n. 3, p. 447–451, 1963. DOI: 10.4401/ag-5241. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5241. Acesso em: 26 apr. 2024.