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Joseph William Mellor, A Comprehensive Treatise on Inorganic and Theoretical Chemistry, London, New York, Longmans, Green and Co., (lire en ligne), p. 53
Lawrence M. Principe, The Secrets of Alchemy, Chicago and London, The University of Chicago Press, (lire en ligne)
N. C. Datta, The Story of Chemistry, Hyderabad, Universities Press, (lire en ligne), p. 56