1. S. de Groot, P. Mazur, Non-Equilibrium Thermodynamics (Dover, New York, 1984)
2. D. Bedeaux, S. Kjelstrup, J.V. Sengers (Editors), Non-equilibrium Thermodynamics with Applications (IUPAC, Royal Society of Chemistry, Cambridge, 2016)
3. S. Kjelstrup, D. Bedeaux, E. Johannessen. J. Gross, Non-Equilibrium Thermodynamics for Engineers (World Scientific, Singapore, 2010)
4. D. Bedeaux, S. Kjelstrup, J.V. Sengers, in ref. 2, Chapt. 1, pp. 1--20
5. L. Onsager, Phys. Rev. 37, 405 (1931) 38