1. The Planets: Their Origin and Development;Urey,1952
2. The behavior of volatiles on the lunar surface;Watson;J. Geophys. Res.,1961
3. Ice in the lunar polar regions;Arnold;J. Geophys. Res. Solid Earth,1979
4. Polar hydrogen deposits on the Moon;Feldman;J. Geophys. Res. Planets,2000
5. Detection of water in the LCROSS ejecta plume;Colaprete;Science,2010