The symbolic function in language development in children of initial II (4 years). Revista Universidad de Guayaquil, [S. l.], v. 125, n. 2, p. 55–67, 2017. DOI: 10.53591/rug.v125i2.436. Disponível em: https://revistas.ug.edu.ec/index.php/rug/article/view/252. Acesso em: 5 dec. 2025.