Calculating the earth’s radius: emulating Eratostenes. Revista de Investigaciones Universidad del Quindío, [S. l.], v. 35, n. 1, p. 102–111, 2023. DOI: 10.33975/riuq.vol35n1.863. Disponível em: https://ojs.uniquindio.edu.co/ojs/index.php/riuq/article/view/863. Acesso em: 25 jun. 2026.