1. J. Hopkins, A. Dissel, Plymouth rock: early human missions to near earth asteroids using orion spacecraft, in: AIAA SPACE Conference & Exposition, 2010.
2. A. Zimmer, Mission analysis and conceptual spacecraft design for human exploration of near-earth asteroids (Ph.D. thesis), University of Stuttgart, 2012.
3. D. Landau, N. Strange, Human exploration of near-earth asteroids via solar electric propulsion, in: Proceedings of the AAS/AIAA Space Flight Mechanics Meeting, New Orleans, Lousiana, February 13–17, 2011
4. D. Landau, N. Strange, Near-Earth asteroids accessible to human exploration with high-power electric propulsion, in: AAS/AIAA Astrodynamics Specialist Conference, Girdwood, Alaska, July 31–August 4, 2011.
5. D. Landau, N. Strange, J. Brophy, R. Merrill, J. Dankanich, This way to deep space, in: Global Space Exploration Conference, 2012.