1. NASA Near Earth Object Program Publications by Don Yeomans and Ron Baalke available at http://neo.jpl.nasa’gov/neo/
2. Kowal, C.T., Asteroids: Their Nature and Utilization, John Wiley & Sons, 1988. ISBN 0-470-21230-6.
3. Peebles, C., Asteroids: A History,, Smithsonian Institution Press, 2000. ISBN 1-56098-389-2.