Peg+Cat and problem solved. Edma 0-6: Educación Matemática en la Infancia, [S. l.], v. 6, n. 2, p. 72–79, 2017. DOI: 10.24197/edmain.2.2017.72-79. Disponível em: https://revistas.uva.es/index.php/edmain/article/view/5885. Acesso em: 8 jan. 2026.