S. Lawson, W. Feldman, D. Lawrence, K. Moore, R. Elphic, and R. Belian, Stefanie L. (2005). “Recent outgassing from the lunar surface: the Lunar Prospector alpha particle spectrometer”. J. Geophys. Res.110: doi=10.1029/2005JE002433. doi:10.1029/2005JE002433.