1. S. Brunnermeier and S. A. Martin, Interoperability Cost Analysis of the U.S. Automotive Supply Chain: Final Report DIANE Publishing, 2000.
2. International Organization for Standardization, "ISO 14649: Industrial automation systems and integration - Physical device control - Data model for computerized numerical controllers - Part 11: Process data for milling," Geneva, Switzerland,2000.
3. International Organization for Standardization, "ISO 14649: Industrial automation systems and integration - Physical device control - Data model for computerized numerical controllers - Part 10: General process data," Geneva, Switzerland,2004.
4. International Organization for Standardization, "ISO/DIS 10303-238: Industrial automation systems and integration û Product data representation and exchange û Part 238: Application Protocols: Application interpreted model for computerized numerical controllers," Geneva, Switzerland,2004.
5. Electronic Industries Association, "ANSI/EIA-274-D-1980, Interchangeable Variable Block Data Format for Positioning, Contouring, and Contouring/Positioning Numerically Controlled Machines," Washington, D.C.: 1979.