1. ISO/IEC 11172-2 (MPEG1), Information technology - Coding of moving pictures and associated audio for digital storage media at up to about 1.5 Mbit/s - Part 2 Video, 1993.
2. ISO/IEC 13818-2, ITU-T Rec. H.262: 1995, Information technology - Generic coding of moving pictures and associated audio information - Part2: Video.
3. ISO/IEC 14496-2, November 1998, International Organization for Standardization, Final Draft of Internal Standard: Information technology Coding of Audio-Visual objects: Visual.
4. International Telecommunications Union Telecommunications Standardization Sector, Recommendation H.261: video codec for audiovisual services at px64 kbits, Helsinki, 1993.
5. International Telecommunications Union Telecommunications Standardization Sector, Recommendation H.263: video coding for low bitrate communication, Geneva, 1996.