JPL Publications
Rapp, D., J. Andringa, R. Easter, J.H. Smith, T. Wilson, L. Clark, and K. Payne, Preliminary System Analysis of Mars ISRU Alternatives, JPL Document D-31341, Jet Propulsion Laboratory, Pasadena, CA, January 25, 2005.
Smith, J.H., A. Elfes, K. Shelton, and C. Weisbin, "Estimating the Value of Space Mission Concepts: A Quantitative Approach for Mission Productivity," JPL Document in process, est. Jan. 2007.