DE FRANCESCO, SILVIO. ESPRESSIONE FORMALE PER FUNZIONI A PICCO. Annals of Geophysics, [S. l.], v. 7, n. 3, p. 409–414, 1954. DOI: 10.4401/ag-5705. Disponível em: https://www.annalsofgeophysics.eu/index.php/annals/article/view/5705. Acesso em: 25 may. 2026.