1. ISO 10303-1:1994. Industrial automation systems and integration—Overview and fundamental principles. International Standard, ISO TC184/SC4, 1994.
2. Brunnermeier, SB, Martin, SA. Interoperability cost analysis of the US automotive supply chain, RESEARCH TRIANGLE INSTITUTE, March 1999, http://www.rti.org/publications/cer/7007-3-auto.pdf.
3. Information Modeling the EXPRESS Way;Schenck,1994
4. ISO 10303-11:1994. Industrial automation systems and integration—product data representation and exchange—Part 11: description methods: the EXPRESS language reference manual, ISO TC184/SC4, 1994.
5. ISO 10303-22:1999. Industrial automation systems and integration—product data representation and exchange—Part 22: implementation methods: standard data access interface, ISO TC184/SC4, 1999.