1. Craciunas, S. & Elsek, I. (2009). The standard model of an e-learning platform. Bucharest, Romania, (Chapter 2).
2. Dobre, I. (2010). Critical Study of the present e-learning systems, Academia Romana, Romania, (Chapter 2).
3. Edgar, R.W. (2005). Security in e-learning. Springer. Vienna University of Technology, Austria, (Chapter 1).
4. Jalal, A. & Ahmad, M. (2008). Security Enhancement for E-Learning Portal. Proceedinggs of International Journal of Computer Science and. Network Security, Department of Computer Science City University, Peshawar, Pakistan, 41-45.
5. Kritzinger, E. & Solms S. (2006). E-learning: Incorporating Information Security Governance, Proceeding of Informing Science and IT Education Conference, Salford (Greater Manchester), England, 319-325.