1. Life-Cycle Cost Comparison of Reusable Launch Systems;Berry;Paper IAA-95-IAA.1.1.02,1995
2. An Investigation of Future European Winged Launcher Concepts;Grallert;IAF Paper 89-216,1989
3. Progress in ESA Winged Launcher Configuration Studies;Grallert;IAF Paper 91-199,1991
4. Studies on a Scramjet-Propelled, Horizontal Launch and Landing, Single-Stage-To-Orbit Launcher;Weinreich;AIAA Paper 93-5053,1993
5. Winged Launcher Configuration Study: Synthesis Report for Study Phases 1 to 6;Grallert;DASA FESTIP Interim Report FSS-DRI-SC-2310-001,1995