J. Alonso-Arévalo and J.-A. Cordón-Garcí­a, “Electronic books and DRM”, ThinKEPI, vol. 5, pp. 249–253, Oct. 2011, Accessed: May 07, 2026. [Online]. Available: https://thinkepi.scimagoepi.com/index.php/ThinkEPI/article/view/30513