William John Macquorn Rankine (1853) "On the general law of the transformation of energy," Proceedings of the Philosophical Society of Glasgow, vol. 3, no. 5, pàgs. 276-280; reimprès a: (1)Philosophical Magazine, series 4, vol. 5, no. 30, pages 106-117 (febrer 1853); i (2) W. J. Millar, ed., Miscellaneous Scientific Papers: by W. J. Macquorn Rankine, ... (Londres, Anglaterra: Charles Griffin and Co., 1881), part II, pàgs. 203-208(anglès)