1. NASA's Exploration Systems Architecture Study Final Report,2005
2. The European Space Agency Exploration Programme Aurora;Messina,2005
3. From Apollo LM to Altair: design, environments, infrastructure, missions, and operations;Cohen,2009
4. China's Space Activities in 2011,2011
5. Certain Problems of Moon Flight Dynamics, Russian Literature of Satellites, Part I;Egorov,1958