1. von Helmholtz, H. On the Interactions of the Natural Forces (1854), reprinted in Popular Scientific Lectures (ed. Kline, M.) (Dover, New York 1961).
2. Eddington, A. S. The Nature of the Physical World, Gifford Lectures 1927 (Cambridge University Press, 1928).
3. Onsager, L. Phys. Rev. 37, 405–426 (1931); ibid 38, 2265–2279 (1931). See also de Groot, S. R. & Mazur, P. Non-equilibrium Thermodynamics (North-Holland, Amsterdam, 1962).
4. Prigogine, I. Etude Thermodynamique des Phénomènes Irréversibles (Desoer, Liège, 1947).
5. Glansdorff, P. & Prigogine, I. Thermodynamic Theory of Structure, Stability and Fluctuations (Wiley-Interscience, New York, 1971).