1. CCITT Recommendation T.6: Facsimile coding schemes and coding control functions for Group 4 facsimile apparatus.
2. DIS 9281: Information Processing—Identification of picture coding methods,1988
3. DIS 9282-1: Information Processing—Coded representation of pictures—Part 1: Encoding principles for picture representation in a 7 or 8 bit environment,1987
4. Special Session for Still Picture Standardization, PCS '88;Hudson,1988
5. IS 2022: Information Processing—ISO 7-bit and 8-bit coded character sets—Code extension techniques,1986