León-Garrido, A., Barroso-Osuna, J.M. and Llorente-Cejudo, M.C. 2024. Design and validation of an evaluation instrument for mobile music apps through expert judgment. Aula Abierta. 53, 2 (Jun. 2024), 169–179. DOI:https://doi.org/10.17811/rifie.20620.