Bidarra, Jose, Mauro Figueiredo, and Carlos Natálio. “Interactive Design and Gamification of EBooks for Mobile and Contextual Learning”. International Journal of Interactive Mobile Technologies (iJIM) 9, no. 3 (July 31, 2015): pp. 24–32. Accessed April 26, 2024. https://online-journals.org/index.php/i-jim/article/view/4421.