Fichera, E. “Campaign for Determining the Longitude of the Fundamental Point of the Astronomic Observatory in Naples — IV. - The Optimum Conditions for Solving the Equation for Longitude”. The International Hydrographic Review 46, no. 1 (June 29, 2015). Accessed July 18, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/23958.