"Weaving Time into System Architecture: Satellite Cost per Operational Day and Optimal Design Lifetime", Acta Astronautica, vol. 54, pp. 413-431, 2004.
"To Reduce or to Extend a Complex Engineering System Design Lifetime? What is at Stake, for Whom, and How to Resolve the Dilemma", AIAA International Communications Satellite Conference, Monterrey, CA, 9-12 May 2004.