1. Ahonen, M., Pehkonen, M., Syvanen, A., & Turunen, H. (2004). Mobile learning and evaluation interim report. Tampere, Finland: University of Tampere.
2. Ally, M. (2005). Using learning theories to design instruction for mobile learning devices. Proceedings of the Third World Conference on Mobile Learning, (pp. 5–8). Rome.
3. Anderson, T. (2008). The theory and practice of online learning. Athabasca, Canada: Athabasca University Press.
4. Android Developer. (2016). Supporting multiple screens. Retrieved from
http://developer.android.com/guide/practices/screens_support.html
.
5. Avellis, G., & Scaramuzzi, A. (2004). Evaluating non-functional requirements in mobile learning contents and multimedia educational software. In J. Attewell & C. Savill-Smith (Eds.), Learning with mobile devices: Research and development. London: Learning and Skills Development Agency.