1. R. Zwanzig,Lectures Theoret. Phys. (Boulder) 3:106 (1961).
2. H. Mori,Progr. Theoret. Phys. 33:423 (1965).
3. N. Van Kampen, inStochastic Processes in Chemical Physics, K. E. Shuler, ed. (Interscience Publishers, New York, 1969), p. 76.
4. L. D. Landau and E. M. Lifshitz,Fluid Mechanics (Pergamon Press, London, 1959), Chapter XVII.
5. L. P. Kadanoff and J. Swift,Phys. Rev. 166:89 (1968); K. Kawasaki,Phys. Rev. 150:291 (1966).