1. S. Möller and A. Raake, Quality of Experience: Advanced Concepts, Applications and Methods, 01 2014.
2. J. Juran and A. B. Godfrey, Quality Handbook, 1999, no. 5th ed.
3. ITU-T Recommendation E.800, Definitions of Terms Related to Quality of Service. Geneva: International Telecommunication Union, 2008.
4. Qualinet White Paper on Definitions of Quality of Experience, COST Action IC 1003, 2013.
5. U. Jekosch, Voice and Speech Quality Perception: Assessment and Evaluation. Springer-Verlag Berlin Heidelberg, 2005.