R. R. Salvatierra Vera, T. del R. Barreiro Zambrano, F. N. Saldarriaga Santana, R. E. Mendoza Saltos, and M. Alcívar Vera, “Comparative study of face-to-face and virtual learning modalities”, Minerva, vol. 1, no. Special, pp. 86-97, Dec. 2022.