Bhattacharji, J. C. « Astrofix by Altitudes of Two Pairs of Stars — One Near Meridian and Another Near Elongation ». The International Hydrographic Review 42, no. 2 (août 5, 2015). Consulté le mai 19, 2024. https://journals.lib.unb.ca/index.php/ihr/article/view/24084.