1. TRANSCOST 6.2 — Statistical-Analytical Model for Cost Estimation and Economical Optimization of Space Transportation Systems;Koelle,1998
2. Why SSTO Rocket Launch Vehicles are now Feasible and Practical-A White Paper;Bekey,1994
3. Cost Engeneering — The New Paradigm for Launch Vehicle Design;Koelle,1997
4. Economics of Fully Reusable Launch Systems;Koelle,1996
5. “Cost-per-Flight”-Definition for Launch Vehicles;The International Standardized,1998