1. ICAF, Industrial College of the Armed Forces. Construction, available at: http://www.ndu.edu/ndu/icaf/industry/construction/construction.htm; 2000.
2. Product data representation and exchange: overview and fundamental principles,1994
3. Product models and beyond;Watson,1995
4. Integrated generic resources: geometric and topological representation, Corrigendum, 2 1999, ICS 25.040.40,1999
5. ISO 10303-43 Date: 1997-10-01 Product data representation and exchange: integrated generic resource: representation structures (Revision of ISO/CD 10303-43:1994).