Herrera Sierra, G., and M. P. Prendes Espinosa. “Implementation and Analysis of a Flipped Classroom Experience: A Case Study in Upper Secondary School”. Innoeduca. International Journal of Technology and Educational Innovation, vol. 5, no. 1, June 2019, pp. 24-33, doi:10.24310/innoeduca.2019.v5i1.3091.