Proust, J.-L. (1799). Researches on copper, Ann. chim., 32:26-54. Excerpt, in Henry M. Leicester and Herbert S. Klickstein, A Source Book in Chemistry, 1400-1900, Cambridge, MA: Harvard, 1952. Accessed 2008-05-08.
Dalton, J. (1808). A New System of Chemical Philosophy, volume 1, Manchester. Excerpt. Accessed 2008-05-08.
William Prout (1815). On the relation between the specific gravities of bodies in their gaseous state and the weights of their atoms. Annals of Philosophy, 6: 321–330. Online reprint
William Prout (1816). Correction of a mistake in the essay on the relation between the specific gravities of bodies in their gaseous state and the weights of their atoms. Annals of Philosophy, 7: 111–13. Online reprint