COSTA, Dalilla Ravene Marques da et al. OBMEP in numbers: A quantitative analysis of the awards of schools in Piauí. Seven Editora, [S. l.], p. 275–289, 2024. Disponível em: https://sevenpubl.com.br/editora/article/view/4378. Acesso em: 21 aug. 2025.