Estimation of the Market Potential for Supersonic Airliners via Analysis of the Global Premium Ticket Market. B. Liebhardt, K. Lütjens, V. Gollnick AIAA 2011-6801, ATIO 2011, Virginia Beach (VA), USA http://elib.dlr.de/75274/
An Analysis of the Market Environment for Supersonic Business Jets. B. Liebhardt, K. Lütjens DLRK 2011, Bremen http://elib.dlr.de/75275/
Supersonic Deviations: Assessment of Sonic-Boom-Restricted Flight Routing. B. Liebhardt, F. Linke, K. Dahlmann Journal of Aircraft 51(6) 1987-95, 2014, DOI: 10 2514/1 C032591 http://elib.dlr.de/93282/
Exploring the Prospect of Small Supersonic Airliners - A Business Case Study Based on the Aerion AS2 Jet. B. Liebhardt, K. Lütjens, R.R. Tracy, A.O. Haas AIAA 2017-3588, ATIO 2017, Denver (CO), USA http://elib.dlr.de/111925