KOPACZ, Piotr. On geometric properties of spherical conics and generalization of π in navigation and mapping. Geodesy and Cartography, [S. l.], v. 38, n. 4, p. 141–151, 2012. DOI: 10.3846/20296991.2012.756995. Disponível em: https://journals.vilniustech.lt/index.php/GAC/article/view/4766. Acesso em: 12 may. 2025.