1. See e.g. J. K. Percus, in “Simple Models of Equilibrium and Nonequilibrium Phenomena,” ed. J. L. Lebowitz (North-Holland, 1987).
2. See e.g. E. R. Davidson, “Reduced Density Matrices in Quantum Chemistry”, (Academic Press, 1976).
3. J. L. Lebowitz and J. K. Percus, J. Math. Phys. 4, 116 (1963).
4. J.K. Percus, Gordon Conference onLiquids (1963).
5. J. K. Percus, Int. J. Q. Chem. XIII, 89 (1978).