1. Time-sensitive material;Petroski;American Scientist,2000
2. Szykman S, Sriram RD, Smith SJ, editors. Proceedings of the NIST Design Repository Workshop, Gaithersburg, MD, November 1996, 1998.
3. Mitchell M, Szykman S. Intelligent and distributed engineering design: program synopsis. Available online at , 1998.
4. NIST. Interoperability cost analysis of the US automotive supply chain, NIST Strategic Planning and Economic Assessment Office, Planning Report #99-1, available online at , 1999.