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Mohit, P. Surdas; Johnson, Catherine L.; Barnouin-Jha, Olivier; Zuber, Maria T.; Solomon, Sean C. «Shallow basins on Mercury: Evidence of relaxation?». Earth and Planetary Science Letters, 285, 3-4, 2009, pàg. 355–363. Bibcode: 2009E&PSL.285..355M. DOI: 10.1016/j.epsl.2009.04.023.
usgs.gov
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«Beethoven». Gazetteer of Planetary Nomenclature. United States Geological Survey, 07-10-2016. [Consulta: 19 maig 2017].