H. Hiesinger, J. W. Head, U. Wolf, R. Jaumanm, and G. Neukum (2003). "Ages and stratigraphy of mare basalts in Oceanus Procellarum, Mare Numbium, Mare Cognitum, and Mare Insularum". J. Geophys. Res. ج. 108: 5065. Bibcode:2003JGRE..108.5065H. DOI:10.1029/2002JE001985.
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H. Hiesinger, J. W. Head, U. Wolf, R. Jaumanm, and G. Neukum (2003). "Ages and stratigraphy of mare basalts in Oceanus Procellarum, Mare Numbium, Mare Cognitum, and Mare Insularum". J. Geophys. Res. ج. 108: 5065. Bibcode:2003JGRE..108.5065H. DOI:10.1029/2002JE001985.