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Lalande, Jérôme; Messier, Charles (1769). «Observations of the Transit of Venus on 3 June 1769, and the Eclipse of the Sun on the Following Day, Made at Paris, and Other Places. Extracted from Letters Addressed from M. de La Lande, of the Royal Academy of Sciences at Paris, and F. R. S. to the Astronomer Royal; And from a Letter Addressed from M. Messier to Mr. Magalhaens». Philosophical Transactions59: 374–377. doi:10.1098/rstl.1769.0050. Bibcode: 1769RSPT...59..374D.