1. ISO 9506, Manufacturing Message Specification (MMS), Part I: Service Definition.
2. Handbook of Computer-Communication Standards, Vol. I: The Open Systems Interconnection (OSI) Model and OSl-related Standards;Stallings,1987
3. ISO/IEC, Draft International Standard ISO DIS 9579: Information Technology — Open System Interconnection — Remote Database Access, Part I: Generic Model, Service and Protocol; Part II: SQL Specialization.
4. Formal Reference Base II, ESPRIT Consortium AMICE,1992
5. Presentation Service Specification, VOICE Consortium document.