Incenter: five solved problems proposed for the International Mathematics Olympiad. C.Q.D. - Revista Eletrônica Paulista de Matemática, Bauru, v. 26, p. e26011, 2025. DOI: 10.21167/cqdv26e26011. Disponível em: https://sistemas.fc.unesp.br/ojs/index.php/revistacqd/article/view/516. Acesso em: 12 oct. 2025.