LUGO LUGO, Carlos Alberto; GARCÍA-TORRES, Erika; PALMAS PÉREZ, Santiago Alonso. Levels of proportional reasoning and microworlds. A study on unitary tele-secondary education. Uniciencia, [S. l.], v. 38, n. 1, p. 1–20, 2024. DOI: 10.15359/ru.38-1.13. Disponível em: https://www.revistas.una.ac.cr/index.php/uniciencia/article/view/19139. Acesso em: 24 apr. 2026.