1. Bevana, N., Kirakowskib, J., Maissela, J.: What is usability. In: Proceedings of the 4th International Conference on HCI. Citeseer (1991)
2. Bevan, N.: Usability issues in web site design. In: HCI, no. 2. pp. 803–806 (1997)
3. Lecture Notes in Computer Science;T Olsen,2011
4. Alshamari, M., Mayhew, P.: Technical review: current issues of usability testing. IETE Tech. Rev. 26, 402–406 (2009)
5. Dumas, J.S., Dumas, J.S., Redish, J.: A Practical Guide to Usability Testing. Intellect books, Bristol (1999)