1. Mining the Sky: Untold Riches from the Asteroids, Comets, and Planets;Lewis,1996
2. The technical and economic feasibility of mining the near-earth asteroids;Sonter;Acta Astronaut.,1997
3. Planetary resources—the asteroid mining company;Lewicki;New Sp.,2013
4. Near-Earth Asteroid Mining;Ross,2001
5. Asteroid Mining with Small Spacecraft and its Economic Feasibility;Calla,2018