Oportus Torres, R., A. Ferreira Cabrera, and K. Sáez Carrillo. “Phonological Memory in Spanish As a Foreign Language: A Relational Study”. Íkala, Revista De Lenguaje Y Cultura, vol. 21, no. 2, July 2016, pp. 153-68, doi:10.17533/udea.ikala.v21n02a03.