Bianchi, Simone, Daniele Galli, and Antonella Gasperini. “The First Astronomical Observatory of Italy. The Birth of the Arcetri Observatory (1861-1873)”. Il Colle di Galileo 1, no. 1-2 (March 11, 2013): 55–70. Accessed March 28, 2024. https://oajournals.fupress.net/index.php/cdg/article/view/8620.