1. NASA Broad Agency Announcement, “Constellation Lunar Lander Development Study,” NASA Johnson Space Center NNJ08ZBT001, 11 Jan. 2008.
2. MillerJ.LeggettJ.Kramer-WhiteJ. “Design Development Test and Evaluation Considerations for Safe and Reliable Human Rated Spacecraft Systems,” NASA TM-2008-215126, Vol. 1, 2008.
3. Orion Project System Optimization Methodology Overview
4. Mass growth in space vehicle and exploration architecture development