1. nley, Douglas. "TechnologyEngineering:The ConcurrentDevelopmentofSpaceTransportation Syste s m andTechnology". Paper presentedat the AIAA Space Conference in2003.
2. Cu rran, Frank,Eric Christensen,DaricEscher, PatOdom, Sammy McNully,Neal Lovell, and Bill Pannell. "Propulsion TechnologyAssessmentsWithinNASA's Integrated TechnologyAssessment Center." Paperpresented at the37th AIAA/ASME/SAE/ASEE Joint Propulsion Conference, SaltLakeCity, UT: July 200 1.