1. Artuso, Guarneri and Casati G. (1994): Talk at the conference, Classical and Quantum Billiards, Ascona, July.
2. Becker, R.: Theory of electricity, vol. II, Ch.36.
3. Boltzmann, L. (1896): Entgegnung auf die wdrmetheoretischen Betrachtungen des Hrn. E. Zermelo, english translation in S. Brush, “Kinetic Theory”, vol. 2, 218-, Pergamon Press, 1965.
4. Boltzmann, L. (1902): Lectures on gas theory, english edition annotated by S. Brush, University of California Press, Berkeley, 1964.
5. Bowen, R. (1975): Equilibrium states and the ergodic theory of Anosov diffeomorphisms, Lecture notes in mathematics, vol. 470, Springer Verlag. See also (Gallavotti, 1981).