Ver Thomson, William (1848). «On an Absolute Thermometric Scale founded on Carnot's Theory of the Motive Power of Heat, and calculated from Regnault's Observations». Philosophical Journal.- Ver también Thomson, William (1882). Mathematical and Physical Papers. Cambridge, England: Cambridge University Press. pp. 100 - 106.
breweryhistory.com
Alan Gall: James Joule – Brewer and Man of Science, Brew. Hist., 115, pág. 2-6 (en línea)