Villarreal, I., E. Gómez Lacabex, F. Gallardo del Puerto, M. Martínez Adrián, and M. J. Gutiérrez-Mangado. “Hot Potatoes Activities to Improve Grammatical Accuracy across Different Proficiency Courses”. Journal of English Studies, vol. 18, Dec. 2020, pp. 253-77, doi:10.18172/jes.3969.