1. 1Brophy,J.R.,etal."AsteroidRetrievalFeasibilityStudy,"KeckInstituteforSpaceStudiesReport,April2012.
2. 3Mazanek, D. D., Brophy, J. R., and Merrill, R. G. "Asteroid Retrieval Mission Concept - TrailblazingOur Futurein Space and Helpingto Protect UsfromEarth Impactors,"3rdIAAPlanetaryDefenseConference,Flagstaff,AZApril2013.
3. Landau, D., McElrath, T., Grebow, D., and Strange, N. "Efficient Lunar Gravity Assists for Solar Electric Propulsion Missions,"Paper AAS 12-165, Feb. 2012.