ジャン・リシェ
↑ Olmsted, John W (1942). “The Scientific Expedition of Jean Richer to Cayenne (1672-1673)”. Isis 34 (2): 117–128. Bibcode: 1942Isis...34..117O. doi:10.1086/347762. JSTOR 226212.
↑ http://www.scientificamerican.com/article.cfm?id=astronomical-unit-or-earth-sun-distance-gets-an-overhaul
↑ Poynting, John Henry; Joseph John Thompson (1907). A Textbook of Physics: Properties of Matter, 4th Ed.. London: Charles Griffin & Co.. pp. 20. https://books.google.com/books?id=TL4KAAAAIAAJ&pg=PA20