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A. S. Konopliv, A. B. Binder, L. L. Hood, A. B. Kucinskas, W. L. Sjogren, and J. G. Williams (1998). «Improved Gravity Field of the Moon from Lunar Prospector». Science281 (5382): 1476-1480. PMID9727968. doi:10.1126/science.281.5382.1476.
usgs.gov
pubs.er.usgs.gov
The geologic history of the Luna, 1987, Wilhelms, Don E.; with sections by McCauley, John F.; Trask, Newell J. USGS Professional Paper: 1348. (online)