Hess, H. (1840). Thermochemische Untersuchungen, Annalen der Physik und Chemie (Poggendorff, Leipzig) 126(6): 385 – 404.
visualiseur.bnf.fr
Kelvin, William T. (1849) „An Account of Carnot's Theory of the Motive Power of Heat – with Numerical Results Deduced from Regnault's Experiments on Steam.“ Transactions of the Edinburg Royal Society, XVI. January 2.Scanned Copy
books.google.com
Sir William Thomson, LL.D. D.C.L., F.R.S. Mathematical and Physical Papers. Т. 1. London, Cambridge, C.J. Clay, M.A. & Son, Cambridge University Press, 1882. с. 232.