Yu. V. Barkin, J. M. Ferrándiz and Juan F. Navarro, 'Terrestrial tidal variations in the selenopotential coefficients,' Astronomical and Astrophysical Transactions, Volume 24, Number 3 / June 2005, pp. 215 - 236.) [1]Arhivat în , la Wayback Machine.
„Apollo 17 troctolite 76535”. NASA/Johnson Space Center photograph S73-19456. Curation and Analysis Planning Team for Extraterrestrial Materials (CAPTEM). Accesat în .
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Yu. V. Barkin, J. M. Ferrándiz and Juan F. Navarro, 'Terrestrial tidal variations in the selenopotential coefficients,' Astronomical and Astrophysical Transactions, Volume 24, Number 3 / June 2005, pp. 215 - 236.) [1]Arhivat în , la Wayback Machine.