Alfred Russel Wallace (1853). “A Narrative of Travels on the Amazon and Rio Negro: With an Account of the Native Tribes, and Observations on the Climate, Geology, and Natural History of the Amazon Valley”, p.83, London : Reeve and Company
"Biographies of Distinguished Scientific Men". Book by François Arago, translated by William Henry Smyth, Baden Powell and Robert Grant. Chapter: 'Joseph Fourier', p. 408, 1859.