Sursele materialelor plasate pe 31 martie 2013 la rubrica "Interese”
http://www.wired.com/wiredscience/2013/03/nasa-asteroid-plans/
http://www.csmonitor.com/Science/2013/0325/Cosmic-crash-2022-Space-probes-will-smash-into-asteroid-in-nine-years
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