1. Kam C, Fischer M, Hänninen R, Karjalainen A, Laitinen J. The product model and fourth dimension project. ITcon, vol. 8; 2003, p. 137–66.
2. Houbaux P. The SABLE Project: The SABLE Project: towards unification of IFC Towards Unification of IFC based Product Model based Product Model Servers. IAI-Iberia Industry Day, Madrid; Feb. 2005.
3. Gallaher M, O'Connor A, Dettbarn J, Gilday L. Cost analysis of inadequate interoperability in the U.S. Capital facilities industry, NIST Final Report; August, 2004.
4. Wix J, Espedokken K. Building code and code checking developments in the UK and Norway. Vendor ITM User (VIU) Presentations, Singapore; 2 November, 2004.
5. novaCITYNETS. System Design Specifications for the Integrated Plan Checking System (For Phase 1), BCA CORENET ePlanCheck Doc. Ref. No.: 1C-01-1; 2001.