1. ITU-T Recommendation P.800;Methods for subjective determination of transmission quality,1996
2. ITU- T Recommendation P.804;Subjective diagnostic test method for conversational speech quality analysis,2017
3. ITU-T Recommendation P.911;Subjective Audiovisual Quality Assessment Methods for Multimedia Applications,1998
4. ITU-T Recommendation P.918;Dimension-based subjective quality evaluation for video content,2020
5. Comparison between the discrete acr scale and an extended continuous scale for the quality assessment of transmitted speech;koster;Fortschritte der Akustik-DAGA 91,2015