1. F. H. Ree, inPhysical Chemistry, an Advanced Treatise, edited by D. Henderson (1971) (Academic, New York, 1971), Vol. 8A, Chap. 3.
2. R. J. Baxter, in Ref. 1, Vol. 8A, Chap. 4.
3. What is "liquid"? Understanding the states of matter
4. M. A. Cotter, “The Van Der Waals Approach to Nematic Liquids,” inProceedings of the NATO—ASl on “The Molecular Physics of Liquid Crystals,”edited by G. W. Gray and G. R. Luck-hurst (Plenum, New York, 1978).