1. E. A. Guillemin,Introductory Circuit Theory (Wiley, New York, 1953), Chapters 7 and 10.
2. B. H. Lavenda,Foundations of Physics, to appear.
3. L. Onsager,Phys. Rev. 37, 405 (1931);38, 2265 (1931).
4. I. Prigogine and R. Balescu,Bull. Classe Sci. Acad. Roy. Belg. 41, 912 (1955);42, 256 (1956).
5. J. W. Strutt (Lord Rayleigh),Theory of Sound (Dover, New York, 1945), pp. 150?157.